CN109291029A - Multiple spot setting-out tooling and setting out method based on space coordinate measurement - Google Patents
Multiple spot setting-out tooling and setting out method based on space coordinate measurement Download PDFInfo
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- CN109291029A CN109291029A CN201811421807.7A CN201811421807A CN109291029A CN 109291029 A CN109291029 A CN 109291029A CN 201811421807 A CN201811421807 A CN 201811421807A CN 109291029 A CN109291029 A CN 109291029A
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- setting
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- cone
- multiple spot
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of multiple spot setting-out toolings and setting out method based on space coordinate measurement, including horizonal base plate and hollow column casing, setting-out cone location hole is offered on horizonal base plate, the inner cavity of hollow column casing is connected to setting-out cone location hole, it is hammered into shape in the lumen configured with center setting-out cone and setting-out, it is disposed with setting-out pricker bar shape guiding groove, each setting-out pricker bar shape guiding groove radially extending along hollow column casing on horizonal base plate, and is each equipped with angle point setting-out cone；The upper end of hollow column casing is configured with spherical reflector, and in the upper surface of horizonal base plate, there are two measurement of coordinates holes for setting, and regulating member is equipped on horizonal base plate.Using the multiple spot setting-out tooling and setting out method provided by the invention based on space coordinate measurement, by once adjusting each setting-out mark rapidly can be made on ground, the efficiency and precision of setting-out when effectively improving the installation of large-scale science apparatus ground supports frame supporting leg, and then improve the efficiency and precision of large-scale science apparatus ground supports frame installation.
Description
Technical field
The present invention relates to multiple spot laying out apparatus, and in particular to it is a kind of based on space coordinate measurement multiple spot setting-out tooling and put
Quadrat method.
Background technique
In recent years, it deepens continuously with the mankind to world's cognition, the mankind is facilitated to particle accelerator etc. and are further recognized
The requirement for knowing the large-scale science apparatus in the world and universe is continuously improved, and the scale of large-scale science apparatus also constantly increases.To avoid
The unfavorable factors such as temperature, humidity and vibration influence, and the main components of large-scale science apparatus would generally be installed to higher steady
On qualitative bracket.Unlike general bracket, this kind of bracket usually have volume is big, weight is big, installation accuracy require compared with
The features such as high.To meet bracket installation requirement, it need to usually pass through high-precision spatial coordinate measurment instrument (total station, laser tracking
Instrument etc.) precise measurement and setting-out are carried out, installation mark is made on ground, is convenient for in-site installation.Existing setting-out tooling is usually only
Can carry out setting-out for single-point, cannot only by once adjusting the setting-outs such as the center that can complete, angle point, point on sideline, from
And it is lower to complete multiple spot setting-out efficiency.Solving problem above becomes the task of top priority.
Summary of the invention
It is typically only capable to carry out setting-out for single-point to solve existing setting-out tooling, completes the lower technology of multiple spot setting-out efficiency
Problem, the present invention provide a kind of multiple spot setting-out tooling and setting out method based on space coordinate measurement.
To achieve the above object, technical solution of the present invention is as follows:
A kind of multiple spot setting-out tooling based on space coordinate measurement, including horizonal base plate and it is vertically installed at horizonal base plate
On hollow column casing, be characterized by: offered on the horizonal base plate setting-out cone location hole, the inner cavity of the hollow column casing
It is connected to setting-out cone location hole, is bored in the inner cavity configured with center setting-out and the setting-out above center setting-out cone is hammered into shape,
The lower end of the center setting-out cone is pierced by setting-out cone location hole, and the setting-out hammer can be gone up and down along hollow column casing, be put with percussion center
Sample cone, circumferentially has setting-out pricker bar shape guiding groove along hollow column casing on the horizonal base plate, each setting-out pricker bar shape is drawn
Guide groove extending radially outwardly along hollow column casing, and it is each equipped with the angle point setting-out cone that can be slid along；The hollow column casing
Upper end be configured with spherical reflector, in the upper surface of the horizonal base plate, setting is there are two measurement of coordinates hole, in the horizontal base
At least three are equipped on plate for adjusting the regulating member at horizonal base plate inclination angle.
Using the above structure, by adjusting each regulating member, horizonal base plate can be made to be parallel to the horizontal plane, i.e. open tubular column
Cylinder is perpendicular to horizontal plane；The coordinate that two measurement of coordinates holes can be measured using laser tracker or total station, thus according to number
According to rotation horizonal base plate, the orientation of horizonal base plate is adjusted；Spherical reflector can be measured using laser tracker or total station
Sphere centre coordinate is overlapped the x coordinate of the centre of sphere and y-coordinate with the x coordinate of center setting-out identification point and y-coordinate；Finally using putting
Sample hammers percussion center setting-out cone into shape, can carve center setting-out identification point on ground, then taps each angle point setting-out cone respectively, can
Each angular coordinate or sideline point setting-out identification point are carved on ground；It, can be rapidly by once adjusting using the present invention
Each setting-out mark is made on ground, for instructing the in-site installation of support frame supporting leg, not only setting-out position is accurate, but also significantly
Improve multiple spot setting-out efficiency.
As preferred: the lower end of the hollow column casing is fixedly mounted on the upper surface of horizonal base plate by ring flange,
It is steeped on the ring flange configured with universal horizontal.Using the above structure, it can either guarantee that hollow column casing is vertically fixed on water
On flat underside, and it can steep whether inspection AQL bottom plate is parallel to horizontal plane by universal horizontal.
As preferred: circumferentially offering at least one vertically extending setting-out hammer on the barrel of the hollow column casing and lead
To slot, the setting-out hammer locating slot along the circumferentially extending of hollow column casing, the setting-out are provided in setting-out hammer guide groove upper end
Hammer includes the hammer ontology in cylindrical structure and the setting-out hammer leading axle being circumferentially distributed on hammer ontology, and the setting-out hammer draws
Guide shaft hammers guide groove into shape with corresponding setting-out respectively and setting-out hammer locating slot is slidably matched；When rotation setting-out hammer, make setting-out hammer guidance
When axis is slid into respectively in corresponding setting-out hammer guide groove, the setting-out hammer can tap in described along hollow column casing free-falling
Heart setting-out cone；When sliding into setting-out hammer leading axle in corresponding setting-out hammer locating slot respectively, the setting-out hammer is positioned in sky
On stem cylinder.Using the above structure, simple and reliable, make setting-out cone in center that can accurately carve center setting-out mark on the ground
Point.
As preferred: being provided with graduated scale in the side of the setting-out pricker bar shape guiding groove.Using the above structure, can
The distance between the central axis of accurate judgement angle point setting-out cone and hollow column casing.
As preferred: the measurement of coordinates hole is cone-shaped blind hole.Using the above structure, make laser tracker or total station
The coordinate position of acquisition is more accurate.
As preferred: the inner edge of the hollow column casing upper surface is the conical surface being adapted with spherical reflector.More than
Structure can position spherical reflector more accurately.
As preferred: the regulating member is the adjusting bolt being threadedly engaged with horizonal base plate.Using the above structure, it operates
Simply, reliable and stable, it is low in cost.
A kind of multiple spot setting out method based on space coordinate measurement, is characterized by, follows the steps below:
S1: multiple spot linesman is put and is placed in center setting-out identification point (x to be marked0, y0, z0) position near；
S2: by adjusting each regulating member, being parallel to the horizontal plane horizonal base plate, and the axis of hollow column casing perpendicular to
Horizontal plane；
S3: the space coordinate in two measurement of coordinates holes of measurement, and according to the space coordinate in two measurement of coordinates holes by multiple spot
Setting-out tooling turns to preset orientation；
S4: the sphere centre coordinate (x, y, z) of spherical reflector is measured, and judges whether x=x0And y=y0: no, translational adjustment
The position of multiple spot setting-out tooling, until x=x0And y=y0, it is, into next step；
S5: whether inspection AQL bottom plate is parallel to the horizontal plane: it is no, each regulating member is adjusted, until horizonal base plate and water
Plane is parallel, is, into next step；
S6: repeating step S4 and step S5, until horizonal base plate is parallel to the horizontal plane and x=x0, y=y0；
S7: it is bored using setting-out hammer percussion center setting-out, setting-out cone in center is made to carve center setting-out identification point on ground；
S8: position of each angle point setting-out cone in corresponding setting-out pricker bar shape guiding groove is adjusted, taps each angle afterwards in place
Point setting-out cone makes each angle point setting-out cone carve angle point setting-out identification point or sideline point setting-out identification point on ground.
Easy to operate using above method, not only setting-out is high-efficient, but also setting-out position is accurate, effectively improves large-scale section
The efficiency and precision of setting-out when learning the installation of device ground supports frame supporting leg.
As preferred: more by block positioning by auxiliary after multiple spot setting-out tooling is turned to preset orientation in step S3
Point setting-out tooling.Using above method, rotates, ensure that more when can prevent multiple spot linesman mounted in Level tune position
The accuracy in point setting-out tooling orientation.
Compared with prior art, the beneficial effects of the present invention are:
It is ingenious in design using the multiple spot setting-out tooling and setting out method provided by the invention based on space coordinate measurement, surely
It is fixed reliable, each setting-out mark rapidly can be made on ground by once adjusting, with effectively improving large-scale science apparatus
The efficiency and precision of setting-out when face support frame supporting leg is installed, so improve the efficiency of large-scale science apparatus ground supports frame installation with
Precision.
Detailed description of the invention
Fig. 1 is the schematic perspective view at the one of visual angle of the present invention；
Fig. 2 is the schematic perspective view at another visual angle of the invention；
Fig. 3 is schematic diagram of internal structure of the invention.
Specific embodiment
The invention will be further described with attached drawing with reference to embodiments.
As shown in FIG. 1 to 3, a kind of multiple spot setting-out tooling based on space coordinate measurement, including it is horizonal base plate 1, hollow
7, ring flange 8, universal horizontal are bored in column casing 2, center setting-out cone 3, setting-out hammer 4, spherical reflector 5, regulating member 6, angle point setting-out
Bubble 9 and graduated scale 10.
Referring to Figure 1~Fig. 3, the horizonal base plate 1 is square or the plate structure of rectangle, in the horizonal base plate 1
Center offers setting-out cone location hole 1a, and multiple setting-out pricker bar shape guiding groove 1b, Ge Gefang are provided on horizonal base plate 1
Sample pricker bar shape guiding groove 1b is circumferentially distributed in around setting-out cone location hole 1a, also, each setting-out pricker bar shape guiding groove 1b
Radially extending along setting-out cone location hole 1a, is each equipped with the angle point that can be slid along in each setting-out pricker bar shape guiding groove 1b
Setting-out cone 7 taps angle point setting-out cone 7 with tools such as rubber hammers, it will be able to carve angle point setting-out identification point or sideline on the ground
Point setting-out identification point.It should be pointed out that can only wherein setting-out pricker bar shape guiding groove 1b configured with can slide along
Angle point setting-out cone 7, angle point setting-out cone 7 is inserted into each setting-out pricker bar shape guiding groove 1b one by one, can distinguish on the ground
Carve each angle point setting-out identification point or sideline point setting-out identification point.Also, in the side of the setting-out pricker bar shape guiding groove 1b
Be provided with graduated scale 10, in order to precise control of angular point setting-out cone 7 and setting-out cone location hole 1a central axis between away from
From.
Referring to Figure 1, in the setting of the upper surface of the horizonal base plate 1, there are two the seats for being used for 1 orientation of position level bottom plate
Mapping metering-orifice 1c, two measurement of coordinates hole 1c are located at two adjacent edges of horizonal base plate 1.Meanwhile the coordinate is surveyed
Metering-orifice 1c is cone-shaped blind hole, and the coordinate for making laser tracker or total station obtain measurement of coordinates hole 1c is more accurate, in order to
Accurate 1 orientation of controlled level bottom plate.
Referring to Figure 1 and Fig. 2, at least three are equipped on the horizonal base plate 1 for adjusting the tune at 1 inclination angle of horizonal base plate
Component 6 is saved, the regulating member 6 is the adjusting bolt being threadedly engaged with horizonal base plate 1, and rotation, which adjusts bolt, can adjust water
The inclination angle of flat underside 1.The present embodiment preferably uses three adjusting bolts, and one of bolt that adjusts is arranged in two measurement of coordinates
Middle position between the 1c of hole, other two adjusting bolt are located at horizonal base plate 1 and are not provided with the another of measurement of coordinates hole 1c
Outer two edges.Three adjusting bolt arrangements triangular in shape, it is simple and reliable, it can easily be accommodated.
Referring to Figure 1~Fig. 3 has been vertically mounted open tubular column cylinder 2 in the center of 1 upper surface of horizonal base plate,
The lower end of the hollow column casing 2 is fixedly mounted on the upper surface of horizonal base plate 1 by ring flange 8, is matched on the ring flange 8
It is equipped with universal horizontal bubble 9.There is the hollow column casing 2 upper and lower perforative inner cavity 2d, inner cavity 2d and setting-out cone location hole 1a to connect
It is logical, and the center for making the central axis of inner cavity 2d bore location hole 1a with setting-out is overlapped.The upper end configuration of the hollow column casing 2 is useful
In the spherical reflector 5 of adapted space measurement of coordinates, also, the inner edge of 2 upper surface of hollow column casing is suitable with 5 phase of spherical reflector
The conical surface 2c answered, i.e. spherical reflector 5 are placed on conical surface 2c, reliable and stable.
Referring to Figure 1~Fig. 3, configured with center setting-out cone 3 and above center setting-out cone 3 in the inner cavity 2d
The lower end of setting-out hammer 4, the center setting-out cone 3 is pierced by from inner cavity 2d, and is passed through setting-out and bored location hole 1a, and the setting-out hammer 4 is used
3 are bored in tapping center setting-out, and can be gone up and down along hollow column casing 2.Specifically, on the barrel of the hollow column casing 2 circumferentially
At least one vertically extending setting-out hammer guide groove 2a is offered, is provided in the setting-out hammer upper end guide groove 2a along hollow
Locating slot 2b is hammered in the setting-out that column casing 2 peripherally and outwardly extends into shape, and the setting-out hammer 4 includes hammer ontology 4a and the edge in cylindrical structure
The setting-out hammer leading axle 4b being circumferentially distributed on hammer ontology 4a, the setting-out hammer leading axle 4b is hammered into shape with corresponding setting-out respectively to be oriented to
Slot 2a and setting-out hammer locating slot 2b are slidably matched.When rotation setting-out hammer 4, setting-out hammer leading axle 4b is made to slide into corresponding setting-out respectively
When hammering into shape in guide groove 2a, the setting-out hammer 4 can tap the center setting-out cone 3 along hollow 2 free-falling of column casing；When will put
When sample hammer leading axle 4b is slid into respectively in corresponding setting-out hammer locating slot 2b, the setting-out hammer 4 is positioned on hollow column casing 2.
Fig. 3 is referred to, the center setting-out cone 3 includes that centrum is bored in sequentially connected setting-out cone head part, setting-out from top to bottom
Sharp portion, the lower end undergauge of the inner cavity 2d are bored with setting-out, the inner cavity lower end 2d diameter shrinkage part and setting-out cone centrum are adapted, and
2d non-diameter shrinkage part in inner cavity is then adapted with setting-out cone head part.By this design, center setting-out cone 3 can be limited and fallen most
Lower position prevents 3 abjection of center setting-out cone.
A kind of multiple spot setting out method based on space coordinate measurement, follows the steps below:
S1: multiple spot linesman is put and is placed in center setting-out identification point (x to be0, y0, z0) position near.
S2: by adjusting each regulating member 6, while observing universal horizontal bubble 9, when the bubble of universal horizontal bubble 9 is located at
When center, horizonal base plate 1 is parallel to the horizontal plane, at this point, the axis of hollow column casing 2 is perpendicular to horizontal plane.
S3: it is sat using the space coordinate of two measurement of coordinates hole 1c of laser tracker or total station survey, and according to two
Multiple spot setting-out tooling is turned to preset orientation by the space coordinate of mapping metering-orifice 1c, when multiple spot setting-out tooling turn to it is preset
Behind orientation, multiple spot setting-out tooling, the orientation of pre-locked multiple spot setting-out tooling are positioned by block by auxiliary, it should be pointed out that
During subsequent translation adjustment multiple spot setting-out tooling, it should be avoided and biggish change in displacement occurs by block.
S4: using laser tracker or the sphere centre coordinate (x, y, z) of total station survey spherical reflector 5, and judge whether x
=x0And y=y0: no, the position of translational adjustment multiple spot setting-out tooling, until x=x0And y=y0, it is, into next step.
S5: whether inspection AQL bottom plate 1 is parallel to the horizontal plane (whether the bubble of observation universal horizontal bubble 9 is located at centre bit
Set): it is no, each regulating member 6 is adjusted, until horizonal base plate 1 is parallel to the horizontal plane, is, into next step.
S6: repeating step S4 and step S5, and until horizonal base plate 1 is parallel to the horizontal plane, (bubble of universal horizontal bubble 9 is located at
Center) and x=x0, y=y0。
S7: rotation setting-out hammer 4 makes setting-out hammer 4 free-fallings into shape, taps center setting-out cone 3, makes setting-out cone 3 in center on ground
Center setting-out identification point is carved, center setting-out is completed.
S8: position of each angle point setting-out cone 7 in corresponding setting-out pricker bar shape guiding groove 1b is adjusted, passes through rubber afterwards in place
The tools such as hammer tap each angle point setting-out cone 7, and each angle point setting-out cone 7 is made to carve angle point setting-out identification point or sideline point on ground
Setting-out identification point completes angle point or sideline point setting-out.
Finally, it should be noted that foregoing description is only the preferred embodiment of the present invention, the ordinary skill people of this field
Member under the inspiration of the present invention, without prejudice to the purpose of the present invention and the claims, can make multiple similar tables
Show, such transformation is fallen within the scope of protection of the present invention.
Claims (9)
1. a kind of multiple spot setting-out tooling based on space coordinate measurement, including horizonal base plate (1) and it is vertically installed at horizontal base
Hollow column casing (2) on plate (1), it is characterised in that: setting-out cone location hole (1a), institute are offered on the horizonal base plate (1)
The inner cavity (2d) for stating hollow column casing (2) is connected to setting-out cone location hole (1a), and center setting-out is configured in the inner cavity (2d)
It bores (3) and (4) is hammered in the setting-out being located above center setting-out cone (3) into shape, the lower end of the center setting-out cone (3) is pierced by setting-out cone positioning
Hole (1a), the setting-out hammer (4) can go up and down along hollow column casing (2), to tap center setting-out cone (3), in the horizonal base plate (1)
On along hollow column casing (2) circumferentially have setting-out pricker bar shape guiding groove (1b), the equal edge of each setting-out pricker bar shape guiding groove (1b)
Hollow column casing (2) extend radially outwardly, and are each equipped with the angle point setting-out cone (7) that can be slid along；
The upper end of the hollow column casing (2) is configured with spherical reflector (5), is provided in the upper surface of the horizonal base plate (1)
Two measurement of coordinates holes (1c) are equipped at least three for adjusting the tune at horizonal base plate (1) inclination angle on the horizonal base plate (1)
It saves component (6).
2. the multiple spot setting-out tooling according to claim 1 based on space coordinate measurement, it is characterised in that: the open tubular column
The lower end of cylinder (2) is fixedly mounted on the upper surface of horizonal base plate (1) by ring flange (8), is matched on the ring flange (8)
It is equipped with universal horizontal bubble (9).
3. the multiple spot setting-out tooling according to claim 1 based on space coordinate measurement, it is characterised in that: described hollow
At least one vertically extending setting-out hammer guide groove (2a) is circumferentially offered on the barrel of column casing (2), is led in setting-out hammer
Setting-out hammer locating slot (2b) circumferentially extended along hollow column casing (2) is provided with to the upper end slot (2a), the setting-out hammer (4) includes
In cylindrical structure hammer ontology (4a) and be circumferentially distributed in hammer ontology (4a) on setting-out hammer leading axle (4b), it is described to put
Sample hammer leading axle (4b) can be slidably matched with corresponding setting-out hammer guide groove (2a) and setting-out hammer locating slot (2b) respectively；
It is described when sliding into setting-out hammer leading axle (4b) respectively in corresponding setting-out hammer guide groove (2a) when rotation setting-out hammer (4)
(4) are hammered in setting-out, which into shape, to tap the center setting-out cone (3) along hollow column casing (2) free-falling；When by setting-out hammer into shape leading axle (4b)
When slid into corresponding setting-out hammer locating slot (2b) respectively, the setting-out hammer (4) is positioned on hollow column casing (2).
4. the multiple spot setting-out tooling according to claim 1 based on space coordinate measurement, it is characterised in that: in the setting-out
The side of pricker bar shape guiding groove (1b) is provided with graduated scale (10).
5. the multiple spot setting-out tooling according to claim 1 based on space coordinate measurement, it is characterised in that: the coordinate is surveyed
Metering-orifice (1c) is cone-shaped blind hole.
6. the multiple spot setting-out tooling according to claim 1 based on space coordinate measurement, it is characterised in that: the open tubular column
The inner edge of cylinder (2) upper surface is the conical surface (2c) being adapted with spherical reflector (5).
7. the multiple spot setting-out tooling according to claim 1 based on space coordinate measurement, it is characterised in that: the adjustment portion
Part (6) is the adjusting bolt being threadedly engaged with horizonal base plate (1).
8. a kind of multiple spot setting out method based on space coordinate measurement, which is characterized in that follow the steps below:
S1: multiple spot linesman is put and is placed in center setting-out identification point (x to be marked0, y0, z0) position near；
S2: by adjusting each regulating member (6), horizonal base plate (1) is parallel to the horizontal plane, and the axis of hollow column casing (2)
Perpendicular to horizontal plane；
S3: the space coordinate of two measurement of coordinates holes (1c) of measurement, and will according to the space coordinate of two measurement of coordinates holes (1c)
Multiple spot setting-out tooling turns to preset orientation；
S4: the sphere centre coordinate (x, y, z) of measurement spherical reflector (5), and judge whether x=x0And y=y0: no, translational adjustment is more
The position of point setting-out tooling, until x=x0And y=y0, it is, into next step；
S5: whether inspection AQL bottom plate (1) is parallel to the horizontal plane: it is no, each regulating member (6) are adjusted, until horizonal base plate (1)
It is parallel to the horizontal plane, is, into next step；
S6: repeating step S4 and step S5, until horizonal base plate (1) is parallel to the horizontal plane and x=x0, y=y0；
S7: tapping center setting-out cone (3) using setting-out hammer (4), and center setting-out cone (3) is made to carve center setting-out mark on ground
Point；
S8: position of each angle point setting-out cone (7) in corresponding setting-out pricker bar shape guiding groove (1b) is adjusted, is tapped afterwards in place each
(7) are bored in angle point setting-out, and each angle point setting-out cone (7) is made to carve angle point setting-out identification point or sideline point setting-out identification point on ground.
9. the multiple spot setting out method according to claim 1 based on space coordinate measurement, it is characterised in that: in step S3,
After multiple spot setting-out tooling is turned to preset orientation, multiple spot setting-out tooling is positioned by block by auxiliary.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421807.7A CN109291029B (en) | 2018-11-27 | 2018-11-27 | Multi-point lofting tool and lofting method based on space coordinate measurement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421807.7A CN109291029B (en) | 2018-11-27 | 2018-11-27 | Multi-point lofting tool and lofting method based on space coordinate measurement |
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| CN109291029B CN109291029B (en) | 2023-04-28 |
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| CN112857175A (en) * | 2021-01-19 | 2021-05-28 | 南通水木清华装饰设计工程有限公司 | Indoor decoration construction measurement lofting equipment and method thereof |
| CN112857175B (en) * | 2021-01-19 | 2021-09-21 | 南通水木清华装饰设计工程有限公司 | Indoor decoration construction measurement lofting equipment and method thereof |
| CN113525594A (en) * | 2021-07-09 | 2021-10-22 | 海南热带海洋学院 | Sea area sign location buoy |
| CN113525594B (en) * | 2021-07-09 | 2022-05-20 | 海南热带海洋学院 | Sea area sign location buoy |
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| CN109291029B (en) | 2023-04-28 |
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