CN208937899U - A kind of underwater lifting projecting subassembly and the projection arrangement using the component - Google Patents
A kind of underwater lifting projecting subassembly and the projection arrangement using the component Download PDFInfo
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- CN208937899U CN208937899U CN201821707920.7U CN201821707920U CN208937899U CN 208937899 U CN208937899 U CN 208937899U CN 201821707920 U CN201821707920 U CN 201821707920U CN 208937899 U CN208937899 U CN 208937899U
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- projection screen
- projection
- channel steel
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- lifting
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- 230000003028 elevating effect Effects 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 61
- 239000010959 steel Substances 0.000 claims description 61
- 238000000034 method Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Overhead Projectors And Projection Screens (AREA)
Abstract
The utility model relates to Fountain Waterscape engineering device technique fields, in particular to the projection arrangement of a kind of underwater lifting projecting subassembly and the application component includes foundation pit and the projection screen that is set in foundation pit dug in underwater, and the projection screen includes the first projection screen and is slidably connected to the first projection screen and accommodates to the second projection screen in the first projection screen；It further include the water surface or being hidden to underwater elevating mechanism for controlling the second projection screen and stretching out or be contracted in the first projection screen and control the stretching of the first projection screen, when needing projection screen to carry out projection waterborne performance, the projection screen for being hidden in underwater is risen from into the water surface by elevating mechanism, for being normally carried out for projection waterborne；When completion projection performance waterborne needs for projection screen to be hidden, drive projection screen is mobile to receive to the foundation pit of underwater by elevating mechanism, and since projection screen is elevating movement, so needing to overcome the resistance of water to greatly reduce in lifting process, to also reduce the equipment requirement to elevating mechanism.
Description
Technical field
The utility model relates to Fountain Waterscape engineering device technique field, in particular to a kind of underwater lifting projecting subassembly and application
The projection arrangement of the component.
Background technique
As the improvement of people's living standards, communal facility gradual perfection.Art construction with ornamental value is increasingly
More presentations in people's lives, such as fountain, projection waterborne etc., and general construction is in park or various scenic spots.
A projection screen is generally fixed in projection waterborne on the water surface, is then projected projected picture to projection by projection arrangement
The display of picture is carried out on screen and is showed, still, current projection screen can not be moved on fixed underwater pedestal,
And projection waterborne is not to carry out always, generally guarantee drop shadow effect can be carried out at night using so that on daytime
When without projection, projection screen, which also protrudes from water surface setting, can then seem very lofty, especially the north in the cold jelly phase, water
Face can be used as ice rink after icing, and the water freezed carry out projection waterborne can not, protrude from the projection screen of the water surface at this time
More water surface space is occupied, to cause the waste in space.
The Chinese patent that notification number is CN205581509U discloses the throwing of projection screen assembly and the application projection screen assembly
Image device, including projection screen, the driving mechanism fixed with projection screen and projection screen is driven to rotate in perpendicular, the projection
The pivot center of screen is located at one end of projection screen；The projection screen is typically mounted in lake, when carrying out projection waterborne, driving machine
Structure drives projection screen rotation to stretch out the water surface, and when projection waterborne stops, driving mechanism drives projection screen rotation to hide to water
Under face, to realize the hiding of projection screen and appear.
But this projection screen, when being hidden, projection screen is to lie low to be placed under water, and work as and need to appear projection screen
When, then need driving mechanism to drive projection screen rotation to erect to be worked normally, still, since projection screen is usual
During area is larger, and driving mechanism drives projection plate to erect, need projection screen that the resistance of water is overcome to realize rotation, and throw
Torque is very big during rotation for shadow screen, so being further improved when projection screen is in setting by compared with big limitation.
Utility model content
First purpose of the utility model is to provide a kind of underwater lifting projecting subassembly, reduces the limitation to projection screen
Property, it is easy to implement the hiding of projection screen and appears.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of underwater lifting projecting subassembly, including digging foundation pit and the projection screen that is set in foundation pit in underwater, institute
Projection screen is stated to include the first projection screen and be slidably connected to the first projection screen and accommodate to the second projection screen in the first projection screen；
Further include for control the second projection screen stretch out or be contracted in the first projection screen and the first projection screen of control stretch out the water surface or
It hides to underwater elevating mechanism.
Through the above technical solutions, will be hidden in when needing projection screen to carry out projection waterborne performance by elevating mechanism
The projection screen of underwater rises from the water surface, for being normally carried out for projection waterborne；It needs when completing projection performance waterborne by projection screen
When being hidden, drive projection screen is mobile to receive to the foundation pit of underwater by elevating mechanism, and since projection screen is lifting fortune
It is dynamic, so needing to overcome the resistance of water to greatly reduce in lifting process, to also reach the equipment requirement to elevating mechanism.
First projection screen with receiving relationship and the second projection screen are set by projection screen, and is realized by elevating mechanism
Elevating movement of second projection screen relative to the first projection screen is further reduced when projection screen is hidden in underwater because of base
Cheat limitation of the depth to projection screen.
The utility model is further arranged to: being provided in the foundation pit and is carried out for the lift path to the first projection screen
The first limit assembly limited is provided on first projection screen and to be defined for the lift path to the second projection screen
Second limit assembly.
Through the above technical solutions, being projected by the first limit assembly and the second limit assembly to the first projection screen and second
The lift path of curtain is defined, and improves the moving stability in projection screen lifting process, and convenient for the first projection screen and the
The adjustable height of two projection screens is controlled, and the descending operation convenience of projection screen is improved.
The utility model is further arranged to: first limit assembly includes multiple purlins being fixedly connected in foundation pit
Frame, multiple are fixedly connected on the non-projection side of the first projection screen and are connected to pair the first channel steel being fixedly connected on truss
Answer the two sides of the first channel steel for moving horizontally the second channel steel limited to the first projection screen, and solid on first channel steel
Surely it is connected with the first limited block, is fixedly connected on second channel steel and is connected to the first limited block for the first projection screen
The second limited block that rise is defined.
Through the above technical solutions, carrying out elevating movement relative to foundation pit in the first projection screen to stretch out the water surface or hiding water
When under face, the horizontal jitter of the first projection screen is reduced by the first channel steel and the cooperation of the second channel steel, so that the first projection screen is only sent out
Raw vertical lifting movement.
The utility model is further arranged to: second channel steel is extended downwardly along foundation pit bottom surface direction.
Through the above technical solutions, by the second channel steel for being extended downwardly along foundation pit bottom surface direction realize to projection screen into
Elevating mechanism is reduced while row is hidden to the rising height of the first projection screen, reduces the requirement to elevating mechanism.
The utility model is further arranged to: second limit assembly includes being fixedly connected on the non-projection of the second projection screen
Third channel steel on the wall of surface side has been correspondingly connected in first projection screen and has been connected to third channel steel two sides for third channel steel
Move horizontally limited with drive the second projection screen only with respect to the first projection screen occur vertical motion the 4th channel steel, institute
State the third for being fixedly connected in the 4th channel steel and being defined for the lifting height to opposite first projection screen of the second projection screen
Limited block is fixedly connected in the third channel steel and abuts to limit the second projection screen lifting height for third limited block
4th limited block.
Through the above technical solutions, being realized by third channel steel and the cooperation of the 4th channel steel in the second projection screen lifting process
The limitation moved horizontally, and realize that the wicking height of the second projection screen limits by the cooperation of third limited block and the 4th limited block
System reduces the phenomenon that the second projection screen is detached from the first projection screen and occurs, and further decreases the difficulty of projection screen lifting manipulation.
The utility model is further arranged to: the third channel steel is extended to along foundation pit bottom surface direction through the first projection
Curtain, the distance that third channel steel stretches out the first projection screen when second projection screen is accommodated to the first projection screen are equal to the second projection screen
Wicking height.
Through the above technical solutions, the second projection screen is reduced to the pressure of the first projection screen by extended third channel steel,
To further decrease the requirement that elevating mechanism goes up and down the second projection screen.
The utility model is further arranged to: the elevating mechanism includes the first hoist and second for being installed on waterfront side
Hoist engine is wound with the first wirerope that one end is fixedly connected on the first projection screen, the first hoist in first hoist
Several first directive wheels are provided between first projection screen；It is wound with one end in second hoist and is fixedly connected on
Second wirerope of two projection screens is provided with several the second guiding between the second hoist and second projection screen
Wheel.
Through the above technical solutions, being realized by first hoist and second hoist to the first wirerope and the second steel wire
The folding and unfolding of rope；And the commutation to wirerope is realized by the first directive wheel and the second directive wheel, while realizing to the first wirerope
With the positioning of the second wirerope, reduces and rub in the first wirerope and the second wirerope moving process, to reduce lifting device
The resistance that first projection screen and the second projection screen are gone up and down.
The utility model is further arranged to: the projection screen selects punched-plate.
Through the above technical solutions, punched-plate structural strength with higher while reducing projection hot spot, and pass through
Punched-plate can be also further reduced and the resistance in water relative movement thereof.
Second purpose of the utility model is to provide a kind of underwater lifting projection arrangement, reduces the limitation to projection screen
Property, it is easy to implement the hiding of projection screen and appears.
A kind of underwater lifting projection arrangement, including the underwater projecting subassembly described in several.
The utility model is further arranged to: several described underwater projecting subassemblies are set as multiple rows of.
Through the above technical solutions, improving ornamental value convenient for further dynamic effect is presented.
In conclusion the utility model has the following beneficial effects: the utility model structure is simple, to elevating mechanism requirement
It reduces, and improves stability when projection screen lifting, projection screen lifting is driven by elevating mechanism, so that projection screen is not working
When be hidden in underwater.
Detailed description of the invention
Fig. 1 is the overall structure diagram of embodiment 1；
Fig. 2 is partial sectional view in embodiment 1, mainly shows the structure of the first limit assembly；
Fig. 3 is the enlarged drawing of A in Fig. 2；
Fig. 4 mainly shows the position of through hole in embodiment 1；
Fig. 5 mainly shows projection screen folded state schematic diagram in embodiment 1；
Fig. 6 shows the displaying arrangement schematic diagram of projection screen in embodiment 2.
Appended drawing reference: 1, projection screen；2, the first projection screen；3, the second projection screen；4, cavity；5, elevating mechanism；6, first
Limit assembly；7, the second limit assembly；8, truss；9, the first channel steel；10, the second channel steel；11, foundation pit；12, the second limited block；
13, third channel steel；14, the 4th channel steel；15, through hole；17, the 4th limited block；18, feed-through collar；20, first hoist；21,
Two hoist engines；22, the first wirerope；23, the second wirerope.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Embodiment 1:
A kind of underwater lifting projecting subassembly, as shown in Figure 1, include dig in underwater foundation pit 11 and be set to foundation pit 11
Interior projection screen 1, the picture of projection device is shown and is showed by projection screen 1, and in the present embodiment, projection screen 1 is used
Punched-plate production, and projection screen 1 may be configured as abnormity.Punched-plate structure with higher while reducing projection hot spot is strong
Degree, and can be also further reduced and the resistance in water relative movement thereof by punched-plate.
Projection screen 1 includes the first projection screen 2 and the second projection screen 3, is provided with cavity 4 in the first projection screen 2, cavity 4 passes through
The upper surface of the first projection screen 2 is worn, the second projection screen 3 is contained in cavity 4.
Underwater lifting projecting subassembly further includes elevating mechanism 5, and elevating mechanism 5 is for controlling the stretching of the second projection screen 3 or receiving
It is reduced in the first projection screen 2 and the first projection screen 2 of control stretches out the water surface or hides to underwater.
When needing projection screen 1 to carry out projection waterborne performance, the projection screen 1 of underwater will be hidden in by elevating mechanism 5
The water surface is risen from, for being normally carried out for projection waterborne；
When completion projection performance waterborne needs for projection screen 1 to be hidden, passes through elevating mechanism 5 and projection screen 1 is driven to move
It is dynamic to receive to the foundation pit 11 of underwater, and since projection screen 1 is elevating movement, so needing to overcome the resistance of water in lifting process
Power greatly reduces, to also reach the equipment requirement to elevating mechanism 5.
First projection screen 2 with receiving relationship and the second projection screen 3 are set by projection screen 1, and passes through elevating mechanism 5
Realize that elevating movement of second projection screen 3 relative to the first projection screen 2 is further reduced when projection screen 1 is hidden in underwater
Because of limitation of 11 depth of foundation pit to projection screen 1.
In the lifting process that elevating mechanism 5 drives the first projection screen 2 and the second projection screen 3, the is provided in foundation pit 11
One limit assembly 6, the second limit assembly 7 is provided on the first projection screen 2, and the first limit assembly 6 is used for the first projection screen 2
Lift path is defined；Second limit assembly 7 is for being defined the lift path of the second projection screen 3.To improve throwing
The moving stability in 1 lifting process of shadow screen, and convenient for being slapped to the adjustable height of the first projection screen 2 and the second projection screen 3
Control improves the descending operation convenience of projection screen 1.
As shown in Fig. 2, the first limit assembly 6, which includes two, is fixedly connected on the truss 8 in foundation pit 11, purlin by built-in fitting
Frame 8 is fixedly connected with the first channel steel 9 close to the end of projection screen 1, is symmetrically fixedly connected on the non-perspective plane of the first projection screen 2
Two the second channel steels 10, the second channel steel 10 are coated on outside the first channel steel 9, and the first channel steel 9 and the cooperation of the second channel steel 10 are realized to the
The limitation that one projection screen 2 moves horizontally.
Second channel steel 10 is extended downwardly along 11 bottom surface direction of foundation pit, so set, projection screen 1 is hidden in realization
Elevating mechanism 5 is reduced simultaneously to the rising height of the first projection screen 2, reduces the requirement to elevating mechanism 5.
And first is fixedly connected with the first limited block (not shown) on channel steel 9, is fixedly connected on the second channel steel 10
It is connected to second limited block 12 of first limited block for being defined to 2 lifting height of the first projection screen.
As shown in figure 3, the second limit assembly 7, which includes two, is symmetrically fixedly connected on the non-perspective plane side wall of the second projection screen 3
On third channel steel 13, be correspondingly connected with that there are two be connected to 13 two sides of third channel steel for third channel steel in the first projection screen 2
The 4th slot that 13 move horizontally is limited to drive the second projection screen 3 that vertical motion occurs only with respect to the first projection screen 2
Steel 14, wherein the perspective plane of the second projection screen 3 is connected to the cavity wall of cavity 4.
As shown in figure 4, third channel steel 13 extends along 11 bottom surface direction of foundation pit, corresponded on the first projection screen 2 there are two opening up
Through hole 15, through hole 15 are communicated with cavity 4, and third channel steel 13 passes through corresponding through hole 15 and prolongs towards close to 11 bottom surface direction of foundation pit
It stretches, the distance that third channel steel 13 stretches out the first projection screen 2 when the receiving of the second projection screen 3 is to the first projection screen 2 is equal to the second projection
The wicking height of curtain 3.The second projection screen 3 is reduced to the pressure of the first projection screen 2, thus into one by extended third channel steel 13
Step reduces the requirement that elevating mechanism 5 goes up and down the second projection screen 3.
As shown in figure 3, being fixedly connected in the 4th channel steel 14 for opposite first projection screen 2 of the second projection screen 3
The third limited block (not shown) that rise is defined is fixedly connected in third channel steel 13 and supports for third limited block
It connects to the 4th limited block 17 of limitation 3 lifting height of the second projection screen.
As shown in Figure 1, elevating mechanism 5 include be respectively fixedly connected in two the second channel steels 10 first pull block and
It is respectively fixedly connected with and pulls block in second in two third channel steels 13；
Waterfront side is equipped with first hoist 20 and second hoist 21, and two first steel are wound in first hoist 20
One end of cord 22, two first wirerope 22 is fixedly connected in first hoist 20, two first wirerope 22 it is another
End is individually fixed in two first pullings blocks, and the first wirerope 22 is when being connected to the first pulling block across the first limited block and the
Two limited blocks 12.And the fixation to realize 22 position of the first wirerope, it is provided between first hoist 20 and the first projection screen 2
Several first directive wheels, and the quantity of the first directive wheel and position are determined according to the distance and position of actual place,
This is not specifically limited；
Two second wirerope 23 are wound in second hoist 21, one end of two second wirerope 23 is fixedly connected on
In second hoist 21, the other end of two second wirerope 23 is individually fixed in two second pulling blocks, and to realize first
The fixation of 22 position of wirerope is provided with several second directive wheels, and second between second hoist 21 and the second projection screen 3
The quantity of directive wheel and position are determined according to the distance and position of actual place, are not specifically limited herein.
As shown in Figure 3, wherein to reduce the friction between the second wirerope 23 and the first projection screen 2, the first projection screen 2
Upper surface is fixedly connected there are two feed-through collar 18, and the second wirerope 23 is fixedly connected on the second pulling block after passing through feed-through collar 18
On.
The folding and unfolding to the first wirerope 22 and the second wirerope 23 is realized by first hoist 20 and second hoist 21,
When second hoist 21 loosens the second wirerope 23, the second projection screen 3 realizes decline under the effect of gravity, as shown in figure 5, being
The schematic diagram of projection screen 1 when in the receiving to the first projection screen 2 of the second projection screen 3；And pass through the first directive wheel and the second directive wheel
It realizes the commutation to wirerope, while realizing the positioning to the first wirerope 22 and the second wirerope 23, reduce by the first wirerope
22 and 23 moving process of the second wirerope in rub, the first projection screen 2 and the second projection screen 3 are gone up and down to reduce lifting device
Resistance.
Embodiment 2:
A kind of underwater lifting projection arrangement, as shown in fig. 6, including five such as underwater projecting subassemblies in embodiment 1, and five
A dry foundation pit 11 communicates, and in five foundation pits communicated 11, five dry underwater projecting subassemblies are set to two rows, so sets
It sets, convenient for further dynamic effect is presented, improves ornamental value.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (10)
1. a kind of underwater lifting projecting subassembly, it is characterised in that: including dig in underwater foundation pit (11) and be set to foundation pit
(11) projection screen (1) in, the projection screen (1) include the first projection screen (2) and are slidably connected to the first projection screen (2) and receive
Hold to the second projection screen (3) in the first projection screen (2)；It further include stretching out or being contracted to for controlling the second projection screen (3)
In one projection screen (2) and control the first projection screen (2) is stretched out the water surface or is hidden to underwater elevating mechanism (5).
2. a kind of underwater lifting projecting subassembly according to claim 1, it is characterised in that: be provided in the foundation pit (11)
For the first limit assembly (6) that the lift path to the first projection screen (2) is defined, set on first projection screen (2)
It is equipped with the second limit assembly (7) being defined for the lift path to the second projection screen (3).
3. a kind of underwater lifting projecting subassembly according to claim 2, it is characterised in that: first limit assembly (6)
Including multiple truss (8) being fixedly connected in foundation pit (11), the first channel steel (9), the Duo Gegu that are fixedly connected on truss (8)
Surely it is connected on the non-projection side of the first projection screen (2) and the two sides for being connected to corresponding first channel steel (9) is used to project to first
Curtain (2) moves horizontally the second channel steel (10) limited, and is fixedly connected with the first limited block on first channel steel (9),
It is fixedly connected on second channel steel (10) and is connected to the first limited block for limiting the first projection screen (2) lifting height
Fixed the second limited block (12).
4. a kind of underwater lifting projecting subassembly according to claim 3, it is characterised in that: second channel steel (10) is along base
Hole (11) bottom surface direction extends downwardly.
5. a kind of underwater lifting projecting subassembly according to claim 4, it is characterised in that: second limit assembly (7)
It is right in first projection screen (2) including the third channel steel (13) being fixedly connected on the non-perspective plane side wall of the second projection screen (3)
It should be connected with and be connected to third channel steel (13) two sides for being limited moving horizontally for third channel steel (13) to drive second
4th channel steel (14) of vertical motion occurs only with respect to the first projection screen (2) for projection screen (3), consolidates in the 4th channel steel (14)
Surely the third limited block being defined for the lifting height to the second projection screen (3) opposite first projection screen (2), institute are connected with
It states to be fixedly connected in third channel steel (13) and abuts to limit the of the second projection screen (3) lifting height for third limited block
Four limited blocks (17).
6. a kind of underwater lifting projecting subassembly according to claim 5, it is characterised in that: the third channel steel (13) is along base
Hole (11) bottom surface direction is extended to through the first projection screen (2), when the second projection screen (3) receiving to the first projection screen (2)
The distance that third channel steel (13) stretches out the first projection screen (2) is equal to the wicking height of the second projection screen (3).
7. a kind of underwater lifting projecting subassembly according to claim 5, it is characterised in that: the elevating mechanism (5) includes
It is installed on the first hoist (20) and second hoist (21) on waterfront side, the fixed company in one end is wound in first hoist (20)
It is connected to the first wirerope (22) of the first projection screen (2), is set between the first hoist (20) and first projection screen (2)
It is equipped with several the first directive wheels；One end is fixedly connected on the second projection screen (3) second is wound in second hoist (21)
Wirerope (23) is provided with several the second directive wheels between the second hoist (21) and second projection screen (3).
8. one kind described in -7 any one goes up and down projecting subassembly under water according to claim 1, it is characterised in that: the projection screen
(1) punched-plate is selected.
9. a kind of underwater lifting projection arrangement, it is characterised in that: including several water as described in claim 1-8 any one
Lower projecting subassembly.
10. a kind of underwater lifting projection arrangement according to claim 9, it is characterised in that: several described underwater projections
Component is set as multiple rows of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821707920.7U CN208937899U (en) | 2018-10-20 | 2018-10-20 | A kind of underwater lifting projecting subassembly and the projection arrangement using the component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821707920.7U CN208937899U (en) | 2018-10-20 | 2018-10-20 | A kind of underwater lifting projecting subassembly and the projection arrangement using the component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208937899U true CN208937899U (en) | 2019-06-04 |
Family
ID=66725409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821707920.7U Withdrawn - After Issue CN208937899U (en) | 2018-10-20 | 2018-10-20 | A kind of underwater lifting projecting subassembly and the projection arrangement using the component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208937899U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116672A (en) * | 2018-10-20 | 2019-01-01 | 杭州西湖喷泉设备成套有限公司 | A kind of underwater lifting projecting subassembly and the projection arrangement using the component |
-
2018
- 2018-10-20 CN CN201821707920.7U patent/CN208937899U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116672A (en) * | 2018-10-20 | 2019-01-01 | 杭州西湖喷泉设备成套有限公司 | A kind of underwater lifting projecting subassembly and the projection arrangement using the component |
| CN109116672B (en) * | 2018-10-20 | 2024-01-30 | 杭州西湖喷泉设备成套有限公司 | Underwater lifting projection assembly and projection device using same |
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