CN208668293U - Steel bridge assembled bracing means - Google Patents
Steel bridge assembled bracing means Download PDFInfo
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- CN208668293U CN208668293U CN201820466660.2U CN201820466660U CN208668293U CN 208668293 U CN208668293 U CN 208668293U CN 201820466660 U CN201820466660 U CN 201820466660U CN 208668293 U CN208668293 U CN 208668293U
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- steel bridge
- limit assembly
- bracing means
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
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- 230000009467 reduction Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 21
- 230000002787 reinforcement Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 14
- 230000001427 coherent effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000011017 operating method Methods 0.000 abstract description 3
- 230000001629 suppression Effects 0.000 abstract description 2
- 206010016256 fatigue Diseases 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
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- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000002929 anti-fatigue Effects 0.000 description 4
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- 239000003822 epoxy resin Substances 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 230000002452 interceptive effect Effects 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 210000003800 pharynx Anatomy 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to steel bridge assembled reinforcement means and steel bridge assembled bracing means, it is expected to solve the problems, such as quick and easy there is presently no a kind of energy and energy active suppression steel bridge fatigue cracking method and bracing means.Steel bridge assembled reinforcement means, including following operating procedure: a pair of of limit assembly being arranged on the steel bridge plate for be provided with crackle, limit assembly is located on steel bridge plate crackle two sides, a pair of limit assembly is connected using pretension bolt, adjusts the spacing control crack size between nut adjustment a pair of limit assembly on pretension bolt.Steel bridge assembled bracing means is connected between a pair of of limit assembly by tensing a pair of limit assembly and adjusting the pretension bolt of a pair of limit assembly spacing including a pair of of limit assembly for being fixed on crackle two sides.All bracing means components of the utility model can transport scene to and carry out assembled installation, low-cost, speed of application is fast, small to Coherent traffic noise after factory completes.
Description
Technical field
The utility model relates to technical field of bridge engineering, in particular to steel bridge assembled bracing means.
Background technique
Important component of the steel bridge as national communication backbone, largely holds the pharynx of railway and highway transportation
It is most important to guarantee that its unimpeded and high quality is on active service safely for larynx.With national communication transport and economic fast development, railway and
The characteristics of volume of traffic increases, heavily loaded ratio improves is presented in highway transportation, by steel structure bridge system and mechanical characteristic, environment
Effect, construction quality and early stage lead to existing steel bridges fatigue cracking case in recent years for the understanding deficiency of steel bridge fatigue Cracking Mechanism
Example takes place frequently, and seriously affects safety, durability and the military service quality of bridge structure, and causes to suspend traffic etc. a variety of times and come into force
It answers, results in significant economic losses and bad social influence.
Need to suspend traffic for traditional reinforcement means of steel bridge fatigue cracking, expense it is high, and secondary tired disease is more, adds
Gu effect is not significant.It is typically now using the reinforcement means of external patch welding steel plate, this method needs such as steel bridge deck fatigue cracking
Will weld job at the scene, since site environment and operating condition are poor, it has not been convenient to which weld job, working efficiency is lower, especially
It is that some positions need to weld in the overhead position, operation difficulty is larger, and the welding quality at scene is poor, and the position of reinforcing is easy to happen two
Secondary fatigue cracking, subsequent maintenance cost are higher；Also, it needs to suspend traffic when site welding operation, causes bad social shadow
Loud and economic loss.Therefore, need at present a kind of pair of traffic interfere less even zero interference, consolidation effect is good, reinforcement cost is low, after
Phase bracing means easy to maintain.
Utility model content
The purpose of this utility model is to provide steel bridge assembled bracing means, and with expectation solution, there is presently no a kind of energy
The problem of quick and easy and energy active suppression steel bridge fatigue cracking bracing means.
To achieve the goals above, applicant uses a kind of steel bridge assembled reinforcement means, including following operating procedure:
A pair of of limit assembly is set on the steel bridge plate for be provided with crackle, and limit assembly is located at steel bridge plate crackle two
On side, a pair of limit assembly is connected using pretension bolt, adjusts nut adjustment a pair of limit assembly on pretension bolt
Between spacing control crack size.
It is found by the applicant that current method need to weld a large amount of steel plate on floorings, and external patch welds a large amount of steel plates
Reinforcement means needs weld job at the scene, since site environment and operating condition are poor, it has not been convenient to weld job, work effect
Rate is lower, and especially some positions need to weld in the overhead position, and operation difficulty is larger, and the welding quality at scene is poor, the portion of reinforcing
Position is easy to happen secondary fatigue cracking, and subsequent maintenance cost is higher；It needs to suspend traffic when site welding operation, cause bad
Social influence and economic loss.
By using this reinforcement means, i.e., fatigue cracking regional area introduce strenthening member, by assembled method with
Existing structure connection, forms the cooperative bearing system being made of existing structure and strenthening member, is interfering traffic even zero less
Interference, to existing structure micro-damage under conditions of, realize the rapid reinforcement that crack to steel bridge fatigue, and pass through setting preload spiral shell
Bolt can also adjust pretension bolt pretightning force and reinforce to the adjusting for partially carrying out active of cracking, active after realizing reinforcing,
It allows the strenthening member of introducing that can have extremely flexible reply steel bridge fatigue problem of Cracking, substantially increases the active of later maintenance
Operability, adaptable, this method can quickly reinforce steel bridge, for promoting the military service quality of steel bridge construction, reduce
Maintenance cost brings particularly important effect.This method construction is convenient, and step is simple, low-cost, has wide answer
Use prospect.
The utility model provides a kind of steel bridge assembled bracing means, including the limit group for being fixed on crackle two sides
Part, by tensing a pair of limit assembly and adjusting the pretension bolt company of a pair of limit assembly spacing between above-mentioned limit assembly
It connects.
All strenthening members of the utility model can transport scene to and carry out assembled installation after factory completes,
Quality is guaranteed, low-cost, and speed of application is fast, small to Coherent traffic noise.Each component is bolted, and avoids site welding
Work, improves the anti-fatigue performance of construction quality and steel bridge plate.
The utility model can allow crack closure by applying the method for pretightning force, and the more traditional reinforcement means of consolidation effect is more
It is good.
Further, the angle that moves towards of extending direction and crackle after the pretension bolt setting is 90 ± 20 °.
Further, above-mentioned limit assembly is two opposite limit plates, above-mentioned two opposite limit plates it
Between be connected and be used to be anchored at steel bridge plate both side plate face, fixing bolt setting on the steel bridge plate by fixing bolt
Seated position and the shortest distance of crackle are in 5-8cm.
It is arranged symmetrically in the positive and negative (steel bridge plate two sides) of cracking plate, allows its stress more reasonable in this way, guarantee to split
Line is in always is closed or levels off to closed state, improves the bearing capacity and anti-fatigue ability of steel bridge plate.
Further, the both ends of above-mentioned pretension bolt are respectively installed with anchor block, which is held in pretension bolt spiral shell
Between female and limit plate.It is two independent components that anchor block and limit plate, which is arranged, primarily to cost is reduced, using anchor block
With the split type setting of limit plate, not only convenient disassembly, cost performance are also higher.
Further, above-mentioned limit plate is the bending plate that middle part is lug boss, formed on the inside of above-mentioned lug boss for
The through slot of anchor block cooperation, above-mentioned lug boss arch upward far from steel bridge plate.
Further, above-mentioned anchor block side is extended for snapping into the convex block on the inside of above-mentioned lug boss.
Further, being connected with self-reacting device on above-mentioned pretension bolt nut, above-mentioned self-reacting device includes passing through transmission
Group is for driving the motor of pretension bolt nut；Above-mentioned self-reacting device further includes the insulated spring folding for being placed in crackle
Piece, the insulated spring tabs include the two sides of intersection, and the end of the two sides is respectively arranged with contact；Above-mentioned insulated spring tabs with
The power electric connection of motor.
Be arranged above-mentioned self-reacting device can realization pretension bolt conveniently, economic adjusted automatically when crackle becomes larger
Section, i.e., when above-mentioned insulated spring tabs is caught in crackle, when crackle continues to expand, the contact on insulated spring tabs is mutual
Contact, motor power are powered, and motor action drives pretension bolt nut by transmission group, and crackle is prevented to continue to crack and make crackle
It is restored to the preceding state that continues to crack.
Further, above-mentioned transmission group includes the fixing sleeve being fixed on pretension bolt nut, above-mentioned fixing sleeve
It is connect by reduction gear box with motor drive.
The utility model is described further with reference to the accompanying drawings and detailed description.The utility model is additional
Aspect and advantage will be set forth in part in the description, and partially will become apparent from the description below.Or it is practical by this
Novel practice is recognized.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to assist understanding to the utility model, provided in attached drawing
Content and its related explanation can be used for explaining the utility model in the present invention, but is not constituted to the utility model not
Work as restriction.In the accompanying drawings:
Fig. 1 is the schematic diagram after the steel bridge assembled bracing means of the utility model reinforces steel bridge plate；
Fig. 2 is the schematic diagram of the limit plate of the utility model；
Fig. 3 is the schematic diagram of the anchor block of the utility model；
Fig. 4 is the schematic diagram of the fixing bolt of the utility model；
Fig. 5 is the schematic diagram of the pretension bolt of the utility model；
Fig. 6 is the reinforcement means schematic diagram of the steel bridge assembled bracing means of the utility model；
Fig. 7 is the self-reacting device schematic diagram of the steel bridge assembled bracing means of the utility model；
Number in figure is successively are as follows: 1- cracking steel bridge plate, the crackle of 11- cracking steel bridge plate, 2- limit plate, 21- are convex
The portion of rising, 3- fixing bolt, 4- anchor block, 41- convex block, 5- pretension bolt, 6- motor, 7- insulated spring tabs, 8- contact, 9- are fixed
Set, 10- reduction gear box.
Specific embodiment
Clear, complete explanation is carried out to the utility model with reference to the accompanying drawing.Those of ordinary skill in the art are being based on
The utility model will be realized in the case where these explanations.Before being illustrated in conjunction with attached drawing to the utility model, spy is needed
It is not pointed out that:
The technical solution provided in each section including following the description and technical characteristic in the utility model,
In the case where not conflicting, these technical solutions and technical characteristic be can be combined with each other.
In addition, the embodiments of the present invention being related in following the description are generally only the reality of one branch of the utility model
Example is applied, instead of all the embodiments.Therefore, based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, the model of the utility model protection all should belong to
It encloses.
About term in the utility model and unit.The specification and claims of the utility model and related part
In term " includes " and its any deformation, it is intended that cover and non-exclusive include.
Present embodiment is by taking the diaphragm plate cracking in Orthotropic Steel Bridge Deck the most common as an example:
As shown in figures 1 to 6, steel bridge assembled bracing means, including the limit assembly for being fixed on 11 two sides of crackle, on
It states and is connected between limit assembly by tensing a pair of limit assembly and adjusting the pretension bolt 5 of a pair of limit assembly spacing.
Certainly, in specific setting, when being apparent curve for crackle 11, using multiple dresses under conditions of can spatially installing
It sets and is reinforced.
When the length of crackle 11 is less than the width of this bracing means, in the steel bridge plate 1 (in present embodiment of cracking
Steel bridge plate 1 refers to that diaphragm plate, following steel bridge plate 1 refer both to diaphragm plate) one this bracing means of arrangement；Work as bracing means
1 times of width≤crackle 11 2 times of width of length≤bracing means when, can arrange two sets of bracing means, and so on.
In specific implementation, pretension bolt 5 here preferably uses high-strength bolt, can be as needed referring to " steel construction is used
High-strength big six-angle spiral, heavy series hexagon nut, gasket techniques condition " (GB/T 1231-2006) selection.
All strenthening members of the utility model can transport scene to and carry out assembled installation after factory completes,
Quality is guaranteed, and each component is bolted, and avoids site welding work, improves the anti-of construction quality and steel bridge plate
Fatigue behaviour, low-cost, speed of application is fast, small to Coherent traffic noise.
The utility model allows crackle 11 to be closed by applying the method for pretightning force, and the more traditional reinforcement means of consolidation effect is more
It is good.
One above-mentioned limit assembly is two opposite limit plates 2, passes through fixation between above-mentioned two opposite limit plates 2
Bolt 3 is connected and for being anchored at 1 two sides plate face of steel bridge plate.Use an above-mentioned limit assembly for opposite two here
Limit plate 2, and it is placed in obverse and reverse sides reinforcing, because when a limit assembly only has one side to dispose a limit plate 2 that can lead
Cause its stress asymmetric, there are eccentric loads, are unfavorable for the closure of crackle 11, adversely affect to crackle 11.
It is arranged symmetrically in the positive and negative (1 two sides of steel bridge plate) of cracking plate, allows its stress more reasonable in this way, guarantee
Crackle 11 in closure or the closed state that levels off to, improves the bearing capacity and anti-fatigue ability of steel bridge plate always.
Specific setting is that fixing bolt 3 passes through the bolt hole of the limit plate 2 of 1 front and back sides of steel bridge plate arrangement, is anchored
Connection.In actual implementation, the plate on bridge is such as thicker generally within 35mm, can lengthen the length of fixing bolt 3, real
Now connect.
The both ends of above-mentioned pretension bolt 5 are respectively installed with anchor block 4, which is held in pretension bolt nut and limit
Between plate 2.The anchor block 4 is set not only for easy to disassemble, setting anchor block and limit plate 2 are two independent portions in this way
Part, primarily to: one, present limit plate 2 can be bent by hot rolled steel plate and be manufactured, and facilitate production, and there are also be exactly hot rolling
The mechanical property of steel plate is more preferable；It is more multiple using hot rolled steel plate if limit plate 2 and anchor block 4 two, are merged into a component
It is miscellaneous, such as will be using the technique of casting, the initial manufacturing defect of the component of production is more, and anti-fatigue performance is poor.So in line with reduce at
This considerations of, using anchor block 4 and the split type setting of limit plate 2, not only convenient disassembly, cost performance are also higher.
Above-mentioned limit plate 2 is the bending plate that middle part is lug boss 21, and above-mentioned lug boss 21 arches upward far from steel bridge plate 1.On
4 side of anchor block is stated to extend for snapping into the convex block 41 on the inside of above-mentioned lug boss 21.Simple mode can have in this way
Imitate the relative position of fixed anchor block 4 and limit plate 2.
Another also further embodiment of this bracing means, such as Fig. 7: on the basis of the above embodiment, on
It states and is connected with self-reacting device on pretension bolt nut, above-mentioned self-reacting device includes by transmission group for driving pretension bolt nut
Motor 6；Above-mentioned self-reacting device further includes the insulated spring tabs 7 for being placed in crackle 11, the insulated spring tabs 7 packet
The two sides of intersection are included, the end of the two sides is respectively arranged with contact 8, to form normal open switch；Above-mentioned insulated spring tabs 7 and electricity
The power electric connection of machine 6.
Above-mentioned insulated spring tabs 7 includes the two sides of intersection, i.e. the side of insulated spring tabs 7 is intersected with the other side to be set
It sets, and the end of the two sides is made to be in normally open, when crackle 11 being allowed to draw close towards closing direction, extruding insulation spring tabs 7
Body, so that end away from movement, conversely, end is drawn close when crackle 11 becomes larger, makes motor 6 be powered, the movement of motor 6 passes through biography
A dynamic group driving pretension bolt nut prevents crackle 11 from continuing to crack and crackle 11 is made to be restored to the preceding state that continues to crack, in setting
The self-reacting device stated can facilitate, economic realization pretension bolt 5 automatically adjusts when crackle 11 becomes larger.Above-mentioned transmission group
Including the fixing sleeve 9 being fixed on pretension bolt nut, above-mentioned fixing sleeve 9 is driven by reduction gear box 10 and motor 6
Connection.Here motor 6 and reduction gear box 10 can also pass through bonding by the setting of bolt on steel bridge plate 1
Mode fix.The setting of reduction gear box 10 is the receiving torque in order to reduce 6 main shaft of motor.Above-mentioned insulated spring folding
Piece 7 can be using the high molecular material with preferably elasticity, such as elastic epoxy resin, High-flexibility epoxy resin, contact 8
Using copper material.
In setting, a set of self-reacting device respectively should be set in 1 positive and negative of steel bridge plate, and allow by concatenated mode
The motor 6 of the self-reacting device of every suit connects, and guarantees that two motors 6 can cooperate with power on/off.
A kind of steel bridge assembled reinforcement means, including following operating procedure:
A pair of of limit assembly is set on the steel bridge plate 1 for be provided with crackle 11, and limit assembly is located at steel bridge plate and splits
On 11 two sides of line, a pair of limit assembly is connected using pretension bolt 5, adjusts the nut adjustment a pair on pretension bolt 5
Spacing between limit assembly controls 11 size of crackle.
Using the reinforcement means of present embodiment, i.e., strenthening member is introduced in fatigue cracking regional area, pass through assembled
Method is connect with existing structure, is formed the cooperative bearing system being made of existing structure and strenthening member, is being interfered less traffic
Even zero interference, to existing structure micro-damage under conditions of, realize the rapid reinforcement that cracks to steel bridge fatigue, and pass through setting
Pretension bolt 5 can also adjust tune of the pretension bolt 5 by pretightning force to the progress active of cracking part after realizing reinforcing
Section is actively reinforced, and allows the strenthening member of introducing that can have extremely flexible reply steel bridge fatigue problem of Cracking, after substantially increasing
The active operation of phase maintenance, adaptable, later maintenance cost is low.
Current reinforcement means, process are more: (1) cleaning cracking plate surface at the scene；(2) it is viscous to brush chemistry for scene
Tie agent；(3) affixing steel plate；(4) Chemical Felter condensation hardening is waited to generate intensity, and the method for present embodiment can be quickly right
It is reinforced in steel bridge, i.e., this reinforcement means only needs two steps: (1) opening bolt hole；(2) bracing means is installed.Each step
It is all fairly simple, it is easy to operate.
The angle that moves towards of extending direction and crackle 11 after the above-mentioned setting of pretension bolt 5 is 90 ± 20 °, by repeatedly testing
It was found that when to move towards angle be 90 ± 20 ° of extending direction and crackle 11 after the setting of pretension bolt 5, consolidation effect is best.
Above-mentioned limit assembly is fixed on the steel bridge plate 1 for being provided with crackle 11 by fixing bolt 3, is existed in fixing bolt 3
Setting position and the shortest distance of crackle 11 on above-mentioned steel bridge plate 1 is most appropriate in 5-8cm.
The related content of the utility model is illustrated above.Those of ordinary skill in the art are being based on these explanations
In the case where will realize the utility model.Above content based on the utility model, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, the model of the utility model protection all should belong to
It encloses.
Claims (8)
1. steel bridge assembled bracing means, it is characterised in that: a pair of of limit assembly including being used to be fixed on crackle (11) two sides,
Pass through the pretension bolt for tensing a pair of limit assembly and adjusting a pair of limit assembly spacing between the pair of limit assembly
(5) it connects；
One limit assembly is two opposite limit plates (2), passes through fixation between two opposite limit plates (2)
Bolt (3) is connected and for being anchored at steel bridge plate (1) two sides plate face.
2. steel bridge assembled bracing means as described in claim 1, it is characterised in that: the both ends of the pretension bolt (5) point
It is not set with anchor block (4), which is held between pretension bolt nut and limit plate (2).
3. steel bridge assembled bracing means as claimed in claim 2, it is characterised in that: the limit plate (2) is that middle part is convex
The bending plate of portion (21) is played, forms the through slot for cooperating with anchor block (4), the lug boss (21) on the inside of the lug boss (21)
It arches upward far from steel bridge plate (1).
4. steel bridge assembled bracing means as claimed in claim 3, it is characterised in that: extend use in anchor block (4) side
In snapping into the convex block (41) on the inside of the lug boss (21).
5. the steel bridge assembled bracing means as described in claim 1-4 any one claim, it is characterised in that: described pre-
Self-reacting device is connected on tight bolt and nut, the self-reacting device includes the electricity for being used to drive pretension bolt nut by transmission group
Machine (6)；The self-reacting device further includes the insulated spring tabs (7) for being placed in crackle (11), the insulated spring tabs
It (7) include the two sides intersected, the end of the two sides is respectively arranged with contact (8)；The insulated spring tabs (7) and motor (6)
Power electric connection.
6. steel bridge assembled bracing means as claimed in claim 5, it is characterised in that: the transmission group includes being fixed at
Fixing sleeve (9) on pretension bolt nut, the fixing sleeve (9) are sequentially connected by reduction gear box (10) and motor (6).
7. steel bridge assembled bracing means as described in claim 1, it is characterised in that: after pretension bolt (5) setting
Extending direction and the angle that moves towards of crackle (11) are 90 ± 20 °.
8. steel bridge assembled bracing means as described in claim 1, it is characterised in that: the limit assembly passes through fixing bolt
(3) it is fixed on the steel bridge plate (1) for being provided with crackle (11), setting position of the fixing bolt (3) on the steel bridge plate (1)
The shortest distance with crackle (11) is in 5-8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820466660.2U CN208668293U (en) | 2018-04-03 | 2018-04-03 | Steel bridge assembled bracing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820466660.2U CN208668293U (en) | 2018-04-03 | 2018-04-03 | Steel bridge assembled bracing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208668293U true CN208668293U (en) | 2019-03-29 |
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ID=65823078
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820466660.2U Expired - Fee Related CN208668293U (en) | 2018-04-03 | 2018-04-03 | Steel bridge assembled bracing means |
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| CN (1) | CN208668293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396662A (en) * | 2018-04-03 | 2018-08-14 | 西南交通大学 | Steel bridge assembled reinforcement means and its bracing means |
| CN111719443A (en) * | 2020-06-01 | 2020-09-29 | 大连理工大学 | Orthotropic steel bridge deck and U rib crack repairing method based on polymer-metal plate |
| CN111962393A (en) * | 2020-08-26 | 2020-11-20 | 西南交通大学 | Double-side welding orthotropic steel bridge deck plate with cross details of transverse partition plates and longitudinal ribs |
-
2018
- 2018-04-03 CN CN201820466660.2U patent/CN208668293U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396662A (en) * | 2018-04-03 | 2018-08-14 | 西南交通大学 | Steel bridge assembled reinforcement means and its bracing means |
| CN111719443A (en) * | 2020-06-01 | 2020-09-29 | 大连理工大学 | Orthotropic steel bridge deck and U rib crack repairing method based on polymer-metal plate |
| CN111962393A (en) * | 2020-08-26 | 2020-11-20 | 西南交通大学 | Double-side welding orthotropic steel bridge deck plate with cross details of transverse partition plates and longitudinal ribs |
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| CF01 | Termination of patent right due to non-payment of annual fee |