CN211112454U - Crawler fabric for emergency rescue - Google Patents
Crawler fabric for emergency rescue Download PDFInfo
- Publication number
- CN211112454U CN211112454U CN201922052403.1U CN201922052403U CN211112454U CN 211112454 U CN211112454 U CN 211112454U CN 201922052403 U CN201922052403 U CN 201922052403U CN 211112454 U CN211112454 U CN 211112454U
- Authority
- CN
- China
- Prior art keywords
- warp
- yarns
- fabric
- weft
- reinforcing ribs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 59
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004760 aramid Substances 0.000 claims description 6
- 229920003235 aromatic polyamide Polymers 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 5
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 2
- 238000009941 weaving Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000002023 wood Substances 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 12
- 230000013011 mating Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 241001127637 Plantago Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical class C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model relates to a crawler fabric for emergency rescue, which belongs to the field of functional fabrics and is characterized in that the crawler fabric comprises a first warp part, a second warp part and weft yarns, wherein the first warp part and the second warp part are arranged at intervals; the first warp yarn group and the second warp yarn group are connected with the weft yarns through two fabric structures, the first fabric structure is a twisted structure formed by two first warp yarns or two second warp yarns and the weft yarns, and the second fabric structure is formed by the first warp yarns or the second warp yarns passing through the surfaces of a plurality of weft yarns along the warp direction to form warp yarn floating long lines; reinforcing ribs penetrate between the warp yarn float long lines and the weft yarns; the silt prevention sinking equipment aims at improving military tanks, enables the tanks to be rapidly and successfully removed from poverty, and can be rapidly packaged and is convenient to use.
Description
Technical Field
The utility model relates to a functional fabric technical field, concretely relates to emergent crawler fabric for speedily carrying out rescue work.
Background
The tank is a huge iron and steel animal which is large and heavy, and the weight of the tank is dozens of tons at all times, so that the tank can well run on hard road surfaces such as roads, and the tank is inevitably silted once meeting soft ground such as mud and marsh. However, dozens of tons of tankers are difficult to pull by the trailer and cannot find the trailer at all in field battles, so the tank soldiers think of a method for utilizing the self-rescue wood. The self-rescue wood is just one common general wood, the diameter of the self-rescue wood is generally required to be about 30 cm, and the length of the self-rescue wood is required to be 3.8 m (generally exceeding the width of the car).
When the tank takes place to become silted up and sinks on muddy road, at first will adorn the wood of saving oneself at the tank afterbody and take off, utilize the steel cable of the wood of saving oneself of carry and couple to adorn respectively on the middle part caterpillar track tooth of two tank action wheel dead ahead tracks, later use the steel cable to be fixed with the wood of saving oneself. And finally, starting the tank, hanging a gear or reversing the gear, controlling the tank to turn, and respectively tensioning the self-rescue wood. After keep tank oil feed after going straight, when the log is in the action wheel below, the tank should flame out, and the passenger need relieve the steel cable and the wood of saving oneself at this moment. Then the tank is restarted, and the first gear or the reverse gear is kept to move forward (backward), so that the tank can get rid of the trouble. These actions can be repeated if one cannot effectively get rid of the trouble. The matching use effect of the several self-rescue trees is better. However, the self-rescue timber is not standard equipment, so that a user is required to supply the self-rescue timber by himself, and the vehicle is often silted due to the fact that the self-rescue timber is not carried. In addition, for fixing the round timber by using the steel wire rope and the track pin, the method is convenient to connect and detach, but has small bearing traction force, can only be used under the conditions of light siltation and low resistance, and the round timber can slip together with the track when self rescue is carried out on deep marsh lands and deep snow lands. At this time, a log is usually connected to a track, and the log and other logs (or bundles of firewood) are connected into a wood row by using a steel wire rope, wherein the diameter of the steel wire rope is 20-30 mm. When saving oneself, the raft is dragged or is pressed below the track by a first log, and the adhesive force increases thereupon, and then the tank is got rid of poverty.
The self-rescue wood has the following defects no matter the self-rescue wood is a single wood or a connected wood row:
1. the device is not standard equipment, cannot be produced in a set manner, and cannot be supplied in a fixed time and a fixed quantity;
2. the volume is large, and the carrying is inconvenient;
3. during self rescue, the operation is troublesome and time-consuming, and manual laying and connection are needed, so that the danger in wartime is increased;
4. for the silted area with large area, deep depth and large resistance, no matter the log or the wood row can not be laid for a long distance, so that the problem cannot be solved.
The same situation also exists in equipment for civil emergency rescue and relief work, when emergency rescue is carried out on a disaster area, the road condition is often complex, once a rescue vehicle is in a silting condition, great difficulty is brought to emergency rescue, and the emergency rescue and relief work with high time urgency requirements is often fatal.
Therefore, in order to improve the tank and prevent that silt sinks to equip, practice thrift space and laying time, guarantee warhead personnel safety also facilitates for civilian emergency rescue and relief disaster simultaneously, the utility model provides an emergent crawler fabric for emergency rescue.
Disclosure of Invention
The utility model aims to solve the technical problem that to prior art not enough, provide an emergent track fabric for speedily carrying out rescue work, the silt-proof that aims at improving for military use tank is sunken to be equipped, practices thrift space and laying time, and guarantee warhead personnel safety also facilitates for civilian rescue and relief work simultaneously.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the crawler fabric for emergency rescue is characterized by comprising a first warp part, a second warp part and weft yarns, wherein the first warp part and the second warp part are arranged at intervals, the first warp part comprises at least two first warp groups, the first warp groups consist of two first warp yarns, the second warp part comprises at least two second warp groups, the second warp groups consist of two second warp yarns, and the first warp yarns and the second warp yarns respectively adopt rigid yarns and flexible yarns; the first warp yarn group and the second warp yarn group are connected with the weft yarns through two fabric structures, the first fabric structure is a twisted structure formed by two first warp yarns or two second warp yarns and the weft yarns, the second fabric structure is a warp yarn floating length formed by the first warp yarns or the second warp yarns passing through the surfaces of a plurality of weft yarns along the warp direction, and the surfaces of the two fabric structures are coated with rubber layers; reinforcing ribs penetrate through the warp floats and the weft yarns, the reinforcing ribs and the yarns in the weft direction are in two alternate connection forms, the reinforcing ribs are arranged between the warp floats and the weft yarns in the first connection form, and the reinforcing ribs are arranged on the twisting structure in the second connection form.
Further, the first warp yarns are steel wire ropes, and the second warp yarns and the weft yarns are aramid yarns or ultra-high molecular weight polyethylene fibers.
Furthermore, the direction of the reinforcing ribs is the same as that of weft yarns.
Furthermore, the reinforcing ribs are made of steel bars and aluminum bars or aluminum bars coated by nylon.
Further, the rubber layer is made of hydrogenated butadiene-acrylonitrile rubber.
The crawler fabric for emergency rescue as described above can be used as an anti-silting device for a tank or for laying an emergency road for a traveling vehicle.
The specific operation method comprises the following steps: arrange tank roof in with this track fabric batching book, during the use, set up the support of mating formation in tank or the vehicle front portion of marcing to arrange this track fabric batching book in on the support of mating formation, ground is arranged in to track fabric book one end, utilizes the tank to roll the track fabric book at the in-process of marcing and realizes opening a book, and then accomplishes laying out of a book of track fabric.
Furthermore, a power device capable of realizing automatic unreeling of the crawler fabric roll can be arranged on the paving support;
furthermore, the power device can adopt a servo motor.
Further, the support of mating formation one end is connected the fabric of mating formation and is rolled up, and the other end is connected in tank front portion with articulated mode to can revolve the support of mating formation to the tank roof through this articulated department.
The utility model has the advantages that: the utility model discloses a hank weave structure and warp length of floating line are the structure cooperation setting of strengthening rib, utilize excelling in of aramid fiber silk, high anti-shear, high wearability and wire rope carry out hank weave net check fabric through the hank braider, through the rubber coating, insert the strengthening rib in warp length of floating line department at last, make it can tolerate the weight of the heavy tank of dozens of tons, track frictional force and track shearing force, can provide the tank on muddy silting is sunken and break away from required frictional force, and then make the tank lose trouble fast successfully, the guarantee combat goes on, guarantee is provided for victory, and can package fast, quick automatic construction, and it is convenient to retrieve, can reuse, and the cost is reduced, can satisfy the requirement of various complicated road conditions.
Drawings
FIG. 1 is a schematic representation of the fabric structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
fig. 3 is a schematic structural diagram of a use state according to an embodiment of the present invention.
In the figure: 1. the warp yarn comprises a first warp yarn, 2, a second warp yarn, 3, a first warp yarn group, 4, a second warp yarn group, 5, a first warp yarn part, 6, a second warp yarn part, 7, a weft yarn, 8, a warp yarn float wire, 9, reinforcing ribs, 10, a paving support, 11, a fabric roll and 12, a power device.
Detailed Description
The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration purposes only and are not intended to limit the scope of the present invention.
As shown in fig. 1 and fig. 2, the crawler fabric for emergency rescue of the present embodiment includes a first warp yarn part 5, a second warp yarn part 6, and weft yarns 7, where the first warp yarn part 5 and the second warp yarn part 6 are arranged at intervals, the first warp yarn part 5 includes at least two first warp yarn groups 3, the first warp yarn group 3 is composed of two first warp yarns 1, the second warp yarn part 6 includes at least two second warp yarn groups 4, the second warp yarn group 4 is composed of two second warp yarns 2, and the first warp yarns 1 and the second warp yarns 2 are respectively made of rigid yarns and flexible yarns;
first warp portion 5 and second warp portion 6 are arranged in turn in this embodiment, and first warp portion 5 comprises two first warp group 3, and second warp portion 6 comprises three second warp group 4, but the utility model discloses a scheme is not limited to above-mentioned array proportion and warp group quantity, and first warp group 3, second warp group 4 comprise two first warp 1, two second warp 2 respectively, and first warp 1, second warp 2 adopt wire rope and aramid yarn respectively, and used aramid yarn also can be replaced with ultrahigh molecular weight polyethylene, 7 material of woof and second warp 2.
Both the first warp set 3 and the second warp set 4 are connected with the weft yarns 7 in two fabric structures: the first fabric structure is a twisted structure formed by two first warp yarns 1 or two second warp yarns 2 and weft yarns 7, the second fabric structure is formed by the warp yarn floats 8 formed by the first warp yarns 1 or the second warp yarns 2 passing through the surfaces of a plurality of weft yarns 7 along the warp direction, and the surfaces of the two fabric structures are coated with Hydrogenated Nitrile Butadiene Rubber (HNBR); as can be seen from the figure, in the present embodiment, for the same warp yarn, the connection mode with the weft yarn is alternatively presented by the two fabric structures, or the connection with the weft yarn is in a twisted structure;
in addition, a reinforcing rib 9 penetrates between the warp float length line 8 and the weft yarn 7, the direction of the reinforcing rib 9 is the same as that of the weft yarn 7, in this embodiment, the reinforcing rib 9 is made of a steel bar, and in addition, the reinforcing rib 9 can also be made of an aluminum bar or an aluminum bar coated by nylon; the reinforcing ribs 9 and the yarns are in two alternate connection forms in the weft direction, the first connection form is that the reinforcing ribs 9 are arranged between the warp float yarns 8 and the weft yarns 7, and the second connection form is that the reinforcing ribs 9 are arranged on the plurality of twisting structure units.
The fabric warp of this embodiment comprises wire rope and aramid yarn/ultra high molecular weight polyethylene fiber, weaves on heavy hank loom, and after one aramid yarn was squeezed into to the latitudinal direction, two warps were twisted each other and were in the same place, wrapped up the woof in the inside, made the woof pin, and difficult the slippage forms warp superficial long line on warp direction, every one section distance, is for after the coating rubber, inserts the billet to increase the grabbing power and the frictional force of track.
The crawler fabric for emergency rescue of the embodiment can be used as anti-silting equipment of a tank, and as shown in fig. 3, the specific operation method comprises the following steps: tank roof is arranged in to this track fabric batching book at first, when needs use, sets up the support 10 of mating formation in the tank front portion to arrange this track fabric batching book in on the support of mating formation, track fabric book one end is arranged in ground, utilizes the tank to roll track fabric book 11 and realize opening a book at the in-process of marcing, and then accomplishes the mating formation of track fabric.
In addition, a power device 12 capable of realizing automatic unwinding of the crawler fabric roll, such as a servo motor, can be arranged on the paving support to realize automatic unwinding and winding; the support one end of mating formation is connected the fabric of mating formation and is rolled up, and the other end is connected in tank front portion with articulated mode to can will mate the support through this articulated department and revolve to the tank roof, so that the fabric rolls up receive and release, will mate the support and take the fabric to roll up and arrange the roof in when idle promptly, rotatory support of mating formation is in order to mat formation the operation to the plantago portion when needing to use.
The main battle tank is heavy (40-60 tons), the driving speed is high (40-72 KM/h), the track fabric can be subjected to high stress strain effect in the tank driving process, the elastomer generates an obvious viscoelastic hysteresis phenomenon, severe heat generation is realized, according to prediction, the internal temperature rise can reach 150 degrees or even exceed 200 degrees, the impact of the metal track on the fabric can be greatly reduced by the HNBR-coated fabric, the hot tearing property, the high shear strength, the high friction strength and the hot oxygen aging resistance are realized, the dynamic flexibility is kept, and the service life of the HNBR-coated tank is prolonged under a severe service environment.
The utility model discloses utilize aramid fiber silk ultra high molecular weight polyethylene fibre's excellence, high anti-shear, high wearability and wire rope carry out the hank through the hank braider and weave into check fabric, through the rubber coating, insert the billet in warp superficial long line department at last, can have sufficient powerful support tank weight, have rolling of sufficient wearability adaptation track, there is the shearing force that tank track was resisted to sufficient anti-shear performance, make it can tolerate the weight of tens tons of heavy tanks, track frictional force and track shearing force, can provide the tank on muddy silting subaerial and break away from required frictional force, and then make the tank get rid of poverty successfully, the guarantee fight goes on, guarantee is provided for victory. This kind of track fabric can large-scale production, makes things convenient for the package, and the tank installs the convenience additional, can lay by oneself, does not need the manual work to leave the tank, and guarantee safety saves laying time, lays apart the area adjustable, can adapt to the road conditions of various different complicacies, retrieves convenient energy reuse, and the comprehensive cost is low, and after road conditions that the area is big, the degree of depth is big, the resistance is big are laid, the tank can pass through by oneself, need not pass through with the help of the assistance of haulage vehicle or other tanks. In addition, the product can also be used for emergent rescue of sudden natural disasters, when the sudden natural disasters happen, a truck is additionally provided with a paving support, an emergency road can be quickly paved under severe road conditions, the poor road conditions can be quickly improved, rescue vehicles can pass through the emergency road, precious time is won for winning disaster relief and winning, the life and property safety of people is guaranteed, and the life and property safety of people is guaranteed.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (5)
1. The crawler fabric for emergency rescue is characterized by comprising a first warp part (5), a second warp part (6) and weft yarns (7), wherein the first warp part (5) and the second warp part (6) are arranged at intervals, the first warp part (5) comprises at least two first warp groups (3), the first warp groups (3) are composed of two first warp yarns (1), the second warp part (6) comprises at least two second warp groups (4), the second warp groups (4) are composed of two second warp yarns (2), and the first warp yarns (1) and the second warp yarns (2) are respectively made of rigid yarns and flexible yarns; the first warp yarn group (3) and the second warp yarn group (4) are connected with the weft yarns (7) through two fabric structures, the first fabric structure is a twisted structure formed by two first warp yarns (1) or two second warp yarns (2) and the weft yarns (7), the second fabric structure is a warp yarn float length yarn (8) formed by the first warp yarns (1) or the second warp yarns (2) passing through the surfaces of a plurality of weft yarns (7) along the warp direction, and the surfaces of the two fabric structures are coated with rubber layers; reinforcing ribs (9) penetrate through the warp float threads (8) and the weft threads (7), the reinforcing ribs (9) and the yarns in the weft direction are in two alternate connection forms, the reinforcing ribs (9) are arranged between the warp float threads (8) and the weft threads (7) in the first connection form, and the reinforcing ribs (9) are arranged on the twist weaving structure in the second connection form.
2. The crawler fabric for emergency rescue according to claim 1, wherein the first warp (1) is made of steel wire rope, and the second warp (2) and the weft (7) are made of aramid yarn or ultra-high molecular weight polyethylene fiber.
3. The crawler fabric for emergency rescue according to claim 1, wherein the direction of the reinforcing ribs (9) is the same as the direction of the weft yarns (7).
4. The track fabric for emergency rescue according to claim 1, wherein the reinforcing ribs (9) are made of steel bars, aluminum bars or aluminum bars coated with nylon.
5. The track fabric for emergency rescue according to claim 1, wherein the rubber layer is made of hydrogenated nitrile butadiene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922052403.1U CN211112454U (en) | 2019-11-25 | 2019-11-25 | Crawler fabric for emergency rescue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922052403.1U CN211112454U (en) | 2019-11-25 | 2019-11-25 | Crawler fabric for emergency rescue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211112454U true CN211112454U (en) | 2020-07-28 |
Family
ID=71702353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922052403.1U Withdrawn - After Issue CN211112454U (en) | 2019-11-25 | 2019-11-25 | Crawler fabric for emergency rescue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211112454U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714258A (en) * | 2019-11-25 | 2020-01-21 | 浩珂科技有限公司 | Crawler fabric for emergency rescue and application thereof |
-
2019
- 2019-11-25 CN CN201922052403.1U patent/CN211112454U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714258A (en) * | 2019-11-25 | 2020-01-21 | 浩珂科技有限公司 | Crawler fabric for emergency rescue and application thereof |
| CN110714258B (en) * | 2019-11-25 | 2024-06-11 | 浩珂科技有限公司 | Caterpillar band fabric for emergency rescue and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105026254B (en) | Loaded on the berthing structure on ship | |
| CN211112454U (en) | Crawler fabric for emergency rescue | |
| CN105417296B (en) | A kind of safe draw off gear of hawser and hawser lay recovery method | |
| CN110714258A (en) | Crawler fabric for emergency rescue and application thereof | |
| CN105672138A (en) | Through type stayed cable installation circulation system and cable threading construction method thereof | |
| EP3980666A1 (en) | A coupling device | |
| US2547935A (en) | Transportation mechanism | |
| CN212296495U (en) | Ultra-long cable and liquid pipe trailing monorail crane for fully mechanized mining face | |
| CN205313899U (en) | Novel wire rope is marked in area | |
| CN207002057U (en) | A kind of cable crane overhead traveling crane trailer system | |
| CN212316537U (en) | Flexible automobile traction ring | |
| CN103569137A (en) | Lifting balloon assisting type emergency cable car | |
| CN203497045U (en) | Mountain caterpillar tractor | |
| CN206690984U (en) | Roll up pull-type full automatic car tarpaulin | |
| CN210797069U (en) | Compound fiber cable of deep sea operation | |
| CN219544439U (en) | High-safety cylindrical belt for trailer | |
| CN207176507U (en) | Hanging cable of stay cable construction platform | |
| CN111648151A (en) | Flexible automobile traction ring | |
| CN215561627U (en) | Special vehicle otter board of getting rid of poverty | |
| CN202969353U (en) | Inflatable rubber oil containment boom | |
| CN208774440U (en) | A kind of automobile anti-skid chain | |
| CN206142298U (en) | Conveyer belt is hung to anti tearing of high strength | |
| CN201415591Y (en) | Automotive self-rescue traction cushion | |
| CN113715562B (en) | Special vehicle otter board of getting rid of poverty | |
| CN205419344U (en) | Hawser safety winding and unwinding devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200728 Effective date of abandoning: 20240611 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200728 Effective date of abandoning: 20240611 |