CN206945435U - Silicone pipes maximum drawbar pull laboratory holder - Google Patents
Silicone pipes maximum drawbar pull laboratory holder Download PDFInfo
- Publication number
- CN206945435U CN206945435U CN201720693449.XU CN201720693449U CN206945435U CN 206945435 U CN206945435 U CN 206945435U CN 201720693449 U CN201720693449 U CN 201720693449U CN 206945435 U CN206945435 U CN 206945435U
- Authority
- CN
- China
- Prior art keywords
- jam
- packed
- inwall
- silicone pipes
- sleeve
- 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.)
- Active
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Silicone pipes maximum drawbar pull laboratory holder, belong to construction material test device field.It is characterized in that including jam-packed inner sleeve and circular lifting disk block, the lifting disk block is arranged on the inside of jam-packed inner sleeve, sets lifting rod on the top of lifting disk block, the lifting rod passes jam-packed inner sleeve upwards;The inwall arc-shaped claws of more than two are hinged on the inwall of jam-packed inner sleeve;The lifting disk block is between each inwall arc-shaped claws;When moving up lifting rod, lifting disk block can push out inwall arc-shaped claws, make inwall arc-shaped claws outwards overhang, the inwall of clamping silicone pipes.The present apparatus can rationally clamp silicone pipes test specimen, will not damage test specimen because of the method for clamping of fixture, conveniently obtain the real experimental data of science.
Description
Technical field
The utility model belongs to construction material test device field, and in particular to a kind of silicone pipes maximum drawbar pull experiment clip
Tool.
Background technology
Silicone pipes be a kind of inwall carry silica gel matter kollag NEW TYPE OF COMPOSITE pipeline, good seal performance, chemically-resistant
Corrode, low engineering cost, be widely used in the optical cable communications network system of highway, railway etc..Silicone pipes are in one kind
Cornice has the NEW TYPE OF COMPOSITE pipeline of silica gel matter kollag, by three plastic extruder synchronization extrusion claddings, main raw material(s)
For high density polyethylene (HDPE), sandwich layer is the minimum kollag silica gel matter of coefficient of friction.Silicone pipes are widely used in optical cable
Communications network system.
Due to being widely used for silicone pipes, thus it is particularly important to the control of its quality.Quality inspection is being carried out to silicone pipes
During survey, its tensile resistance is important technical indicator.In traditional silicone pipes stretching experiment, entered using traditional jaw clamp
Row clamps.This fixture has a drawback in that:
1st, in test operation, it is impossible to ensure to clamp sample on the premise of sample is not damaged.I.e. in drawing process, meeting
Because not clamping cause test specimen to deviate from, drawing process can not be completed.
2nd, do not released for guarantee test specimen, that is, need strongly to tighten, but because the degree of tightening of each laboratory technician has difference,
Without accurate suitable dynamics control, meeting coup injury test specimen, cause occur serious stress concentration phenomenon during drawstring, cause to draw
Experimental data inaccuracy is stretched, is worth without reference to judge.
In consideration of it, applicant, which devises the present apparatus, can solve the problem that above mentioned problem, silicone pipes test specimen, the dress can be rationally clamped
Test specimen will not be damaged because of method of clamping by putting, and conveniently obtain the real experimental data of science.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of silicone pipes maximum drawbar pull laboratory holder, Neng Gouhe
Reason clamps silicone pipes test specimen, and the device will not damage test specimen because of the method for clamping of fixture, conveniently obtain science and really test
Data.
In order to solve the above technical problems, the technical solution of the utility model is:It is real to provide a kind of silicone pipes maximum drawbar pull
Test fixture, it is characterised in that:Including jam-packed inner sleeve and circular lifting disk block, the lifting disk block is arranged on jam-packed inner sleeve
Inside, lifting rod is set on the top of lifting disk block, the lifting rod passes jam-packed inner sleeve upwards;In jam-packed inner sleeve
The inwall arc-shaped claws of more than two are hinged on inwall;The lifting disk block is between each inwall arc-shaped claws;When to moving up
During dynamic lifting rod, lifting disk block can push out inwall arc-shaped claws, make inwall arc-shaped claws outwards overhang, clamping silicone pipes
Inwall.
Preferably, in addition to jam-packed outer sleeve, jam-packed outer sleeve and jam-packed inner sleeve are set in together and led to from outside to inside
Cross threaded connection;The outer wall claw of more than two, one end insertion of the outer wall claw are hinged on the perisporium of jam-packed inner sleeve
In jam-packed inner sleeve, the other end of outer wall claw is passed outside jam-packed inner sleeve;When jam-packed outer sleeve relative to jam-packed inner sleeve to
Under it is in rotary moving when, jam-packed outer sleeve can tighten up outer wall claw, make outer wall card turn the outer wall of clamping silicone pipes.
Preferably, in addition to back-moving spring, the quantity of the back-moving spring are identical with claw quantity;One end of back-moving spring
Connect inwall arc-shaped claws, the inwall of the other end connection jam-packed inner sleeve of back-moving spring;The back-moving spring can be by inwall
Arc-shaped claws are inwardly tightened up.
Preferably, in addition to interior arcs, the lower end of the inwall arc-shaped claws are hinged interior arcs, and the interior arcs are in Nei Bi
When being supportted outside arc-shaped claws, the inwall of interior arcs clamping silicone pipes.
Preferably, in addition to outer arcs, the lower end of the outer wall claw are hinged outer arcs, and the outer arcs are in outer wall claw
When tightening up, the outer wall of outer arcs clamping silicone pipes.
Preferably, the inside and outside arcs include metal outer protecting shell, and the side of the metal outer protecting shell sets articulated elements, and
Inwall arc-shaped claws or outer wall claw are connected by the articulated elements;The opposite side of the metal outer protecting shell sets elastoplasticity to clamp
Layer, the elastoplasticity gripping layer can be bonded clamping silicone pipes closely.
Preferably, the elastoplasticity gripping layer is quality of rubber materials;The thickness of elastoplasticity gripping layer is 1-2.5mm.
Preferably, the jam-packed inner sleeve includes inner barrel, motorized pulleys and external thread sleeve, and the motorized pulleys include
Fixed cylinder and outer rotaring tube, outer rotation can surround fixed cylinder coaxial rotating, and inner barrel is arranged in fixed cylinder, turned outside
The periphery suit external thread sleeve of cylinder, inwall and the outer rotaring tube interference fit of the external thread sleeve are installed, external thread sleeve
External screw thread is opened up on outer wall, the external screw thread is meshed with the internal thread of jam-packed outer sleeve;
The guiding groove of more than one, the interference on jam-packed inner sleeve are longitudinally opened up along the inwall of the jam-packed outer sleeve
The rotation stop collar is fixed, fixes connecting rod, the connecting rod connection sliding block on the rotation stop collar, the sliding block is arranged on guiding groove
In, and can be moved up and down along groove is oriented to;
Also including controller, the controller can make the outer rotaring tube of motorized pulleys rotate by way of wireless remote control,
External thread sleeve is driven to rotate simultaneously, jam-packed outer sleeve can move up and down under the restriction of sliding block, so as to jam-packed or loosen outer
Wall claw.
Preferably, sense electronicses are set to overlay piece in elastoplasticity gripping layer, the sense electronicses overlay piece can be after compression
Send pressure value to controller by way of being wirelessly transferred;Upper pressure limit value is set in controller, when electronics pressure-sensitive
The pressure value that paster detects reaches higher limit, and controller can control motorized pulleys to stop the rotation, and complete the clamping of test specimen
Journey.
Preferably, rubber jam-packed ring is fixed in the bottom of jam-packed outer sleeve.
Compared with prior art, the beneficial effects of the utility model are:
1st, device described in the utility model can rationally clamp silicone pipes test specimen, and the device will not be because of the clamping of fixture
Mode damages test specimen, conveniently obtains the real experimental data of science.
2nd, the present apparatus can implement clamping operation automatically, and clamp dynamics controllable precise, not because the size of test specimen is different,
And constant force clamping can not be carried out.Scientific and reasonable clamping silicone pipes test specimen is not only able to, therefore experimentation is more controllable, can
Repeatedly it is repeated.Further, since chucking power is constant reliable, transverse direction can be carried out with batch or the experimental result of multiple batches of product
Compare, advantageously the quality control in product and data feedback.
3rd, device described in the utility model will not damage test specimen because of the method for clamping of fixture, and Reusability does not influence still to fill
The service life put, maintenance rate is low, suitably in the industry cycle popularizes.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Structural representation when Fig. 2 is silicone pipes test specimen clamped condition;
Fig. 3 is the structural representation of the utility model embodiment two;
Fig. 4 is the structural representation of jam-packed outer sleeve in the utility model embodiment two;
Fig. 5 is Fig. 4 top view;
In figure:
1st, silicone pipes test specimen;2nd, jointed shaft;3rd, outer wall claw;4th, rubber jam-packed ring;5th, back-moving spring;6th, jam-packed overcoat
Cylinder;7th, jam-packed inner sleeve;7.1st, inner barrel;7.2nd, external thread sleeve;7.3rd, outer rotaring tube;7.4th, fixed cylinder;8th, lifting rod;9、
Inwall arc-shaped claws;10th, disk block is lifted;11st, outer arcs;11.1st, elastoplasticity gripping layer;11.2nd, metal outer protecting shell;12nd, inner arc
Piece;12.1st, metal outer protecting shell;12.2nd, elastoplasticity gripping layer;13rd, it is oriented to groove;14th, sliding block;15th, connecting rod;16th, the rotation stop collar.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment one
As illustrated in fig. 1 and 2, a kind of silicone pipes maximum drawbar pull laboratory holder described in the utility model, including in jam-packed
Sleeve and circular lifting disk block, the lifting disk block are arranged on the inside of jam-packed inner sleeve, are set on the top of lifting disk block
Lifting rod, the lifting rod pass jam-packed inner sleeve upwards;The inwall arc of more than two is hinged on the inwall of jam-packed inner sleeve
Shape claw;The lifting disk block is between each inwall arc-shaped claws;When moving up lifting rod, lifting disk block can be outside
Inwall arc-shaped claws are promoted, make inwall arc-shaped claws outwards overhang, the inwall of clamping silicone pipes.
Also include jam-packed outer sleeve, jam-packed outer sleeve and jam-packed inner sleeve are set in together and connected by screw thread from outside to inside
Connect;The outer wall claw of more than two, one end insertion jam-packed inner sleeve of the outer wall claw are hinged on the perisporium of jam-packed inner sleeve
In cylinder, the other end of outer wall claw is passed outside jam-packed inner sleeve;When jam-packed outer sleeve is rotated down shifting relative to jam-packed inner sleeve
When dynamic, jam-packed outer sleeve can tighten up outer wall claw, make outer wall card turn the outer wall of clamping silicone pipes.
Also include back-moving spring, the quantity of the back-moving spring is identical with claw quantity;In one end connection of back-moving spring
Wall arc-shaped claws, the inwall of the other end connection jam-packed inner sleeve of back-moving spring;The back-moving spring can be by inwall arc card
Pawl is inwardly tightened up.
Also include interior arcs, the be hinged interior arcs in lower end of the inwall arc-shaped claws, the interior arcs are in interior wall arc card
When being supportted outside pawl, the inwall of interior arcs clamping silicone pipes.
Also include outer arcs, the lower end of the outer wall claw is hinged outer arcs, the outer arcs when outer wall claw is tightened up,
The outer wall of outer arcs clamping silicone pipes.
The inside and outside arcs include metal outer protecting shell, and the side of the metal outer protecting shell sets articulated elements, and passes through the hinge
Fitting connects inwall arc-shaped claws or outer wall claw;The opposite side of the metal outer protecting shell sets elastoplasticity gripping layer, the bullet
Plasticity gripping layer can be bonded clamping silicone pipes closely.
The elastoplasticity gripping layer is quality of rubber materials;The thickness of elastoplasticity gripping layer is 1-2.5mm.
Rubber jam-packed ring is fixed in the bottom of jam-packed outer sleeve, makes contact of the jam-packed outer sleeve with claw that more there is bullet modeling
Property, avoid jam-packed power excessive, cause the damage of device, influence service life.
The present apparatus when in use, is first in initial position, i.e. jam-packed set outer barrel is located at upper limit, lifting rod and lifting disk
Block is located at lower limit.The back-moving spring can inwardly tighten up inwall arc-shaped claws, can now be placed into silicone pipes test specimen
In jam-packed inner sleeve, each inwall arc-shaped claws are under tightening state in the endoporus of silicone pipes;Jam-packed outer sleeve is rotated down,
Jam-packed set outer barrel is made to tighten up each outer wall claw, outer tube wall of the outer arcs from outside clamping silicone pipes;Lifting rod is moved up simultaneously,
Order lifting disk block outwards overhangs inwall arc-shaped claws, the inwall of arcs jam-packed silicone pipes in order.Due to elastoplasticity gripping layer
Set, flexible clamping can be completed, avoid test specimen from damaging under stress.The both ends of silicone pipes test specimen are made all to complete to clamp
Afterwards, the lifting rod of upper and lower two sleeve clamp is connected into stretching-machine, you can carry out stretching experiment, and record data.
Embodiment two
As shown in figure 3, in the present embodiment, the jam-packed inner sleeve includes inner barrel, motorized pulleys and external thread sleeve,
The motorized pulleys include fixed cylinder and outer rotaring tube, and outer rotation can surround fixed cylinder coaxial rotating, and inner barrel is arranged on
In fixed cylinder, external thread sleeve is set with the periphery of outer rotaring tube, inwall and the outer rotaring tube of the external thread sleeve are interference fitted
Install, open up external screw thread on the outer wall of external thread sleeve, the external screw thread is meshed with the internal thread of jam-packed outer sleeve.
As shown in Figures 4 and 5, the guiding groove of more than one is longitudinally opened up along the inwall of the jam-packed outer sleeve, is being squeezed
The rotation stop collar is fixed in interference on tight inner sleeve, fixes connecting rod, the connecting rod connection sliding block on the rotation stop collar, the sliding block is set
Put in groove is oriented to, and can be moved up and down along groove is oriented to.
Also including controller, the controller can make the outer rotaring tube of motorized pulleys rotate by way of wireless remote control,
External thread sleeve is driven to rotate simultaneously, jam-packed outer sleeve can move up and down under the restriction of sliding block, so as to jam-packed or loosen outer
Wall claw.
Sense electronicses are set to overlay piece in elastoplasticity gripping layer, the sense electronicses overlay piece can be after compression by number pressure
Value sends controller to by way of being wirelessly transferred;Upper pressure limit value is set in controller, when sense electronicses overlay piece detection
To pressure value reach higher limit, controller can control motorized pulleys to stop the rotation, and complete the clamping process of test specimen.
In the present embodiment, device can implement clamping operation automatically, and clamp dynamics controllable precise, not because of test specimen
Size is different, and can not carry out constant force clamping.Scientific and reasonable clamping glass fiber reinforced rebar test specimen is not only able to, therefore is tested
Process is more controllable, is repeatedly repeated, and because chucking power is constant reliable, the experimental result with batch or multiple batches of product can
Lateral comparison is carried out, advantageously in the quality control of product.
The other structures and application method of the present embodiment repeat no more with embodiment one.
It is described above, only it is preferred embodiment of the present utility model, is not that other forms are made to the utility model
Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent
The equivalent embodiment of change.It is every without departing from the content of the technical scheme of the utility model, according to the technical essence of the utility model pair
Any simple modification, equivalent variations and the remodeling that above example is made, still fall within the protection model of technical solutions of the utility model
Enclose.
Claims (10)
1. silicone pipes maximum drawbar pull laboratory holder, it is characterised in that:It is described including jam-packed inner sleeve and circular lifting disk block
Lifting disk block is arranged on the inside of jam-packed inner sleeve, sets lifting rod on the top of lifting disk block, the lifting rod passes upwards
Jam-packed inner sleeve;The inwall arc-shaped claws of more than two are hinged on the inwall of jam-packed inner sleeve;The lifting disk block is positioned at each
Between inwall arc-shaped claws;When moving up lifting rod, lifting disk block can push out inwall arc-shaped claws, make inwall arc
Shape claw outwards overhangs, the inwall of clamping silicone pipes.
2. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 1, it is characterised in that:Also include outside jam-packed
Sleeve, jam-packed outer sleeve and jam-packed inner sleeve are set in together and are connected through a screw thread from outside to inside;In the week of jam-packed inner sleeve
The outer wall claw of more than two is hinged on wall, one end of the outer wall claw is inserted in jam-packed inner sleeve, outer wall claw it is another
End is passed outside jam-packed inner sleeve;When jam-packed outer sleeve is rotated down mobile relative to jam-packed inner sleeve, jam-packed outer sleeve can
Outer wall claw is tightened up, makes outer wall card turn the outer wall of clamping silicone pipes.
3. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 2, it is characterised in that:Also include resetting bullet
Spring, the quantity of the back-moving spring are identical with claw quantity;One end connection inwall arc-shaped claws of back-moving spring, back-moving spring
The other end connects the inwall of jam-packed inner sleeve;The back-moving spring can inwardly tighten up inwall arc-shaped claws.
4. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 2, it is characterised in that:Also include inner arc
Piece, the be hinged interior arcs in lower end of the inwall arc-shaped claws, when the interior arcs support outside interior wall arc-shaped claws, interior arcs clamping
The inwall of silicone pipes.
5. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 4, it is characterised in that:Also include outer arc
Piece, the lower end of the outer wall claw are hinged outer arcs, the outer arcs when outer wall claw is tightened up, outer arcs clamping silicone pipes
Outer wall.
6. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 5, it is characterised in that:The inside and outside arc
Piece includes metal outer protecting shell, and the side of the metal outer protecting shell sets articulated elements, and connects inwall arc card by the articulated elements
Pawl or outer wall claw;The opposite side of the metal outer protecting shell sets elastoplasticity gripping layer, and the elastoplasticity gripping layer can be close
Fitting clamping silicone pipes.
7. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 6, it is characterised in that:The elastoplasticity folder
Tight layer is quality of rubber materials;The thickness of elastoplasticity gripping layer is 1-2.5mm.
8. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 7, it is characterised in that:The jam-packed inner sleeve
Cylinder includes inner barrel, motorized pulleys and external thread sleeve, and the motorized pulleys include fixed cylinder and outer rotaring tube, and outer rotation can
Around fixed cylinder coaxial rotating, inner barrel is arranged in fixed cylinder, and external thread sleeve is set with the periphery of outer rotaring tube, described
The inwall of external thread sleeve is installed with outer rotaring tube interference fit, and external screw thread, the external screw thread are opened up on the outer wall of external thread sleeve
It is meshed with the internal thread of jam-packed outer sleeve;
The guiding groove of more than one is longitudinally opened up along the inwall of the jam-packed outer sleeve, on jam-packed inner sleeve interference fix
The rotation stop collar, connecting rod, the connecting rod connection sliding block are fixed on the rotation stop collar, the sliding block, which is arranged on, to be oriented in groove, and
It can be moved up and down along groove is oriented to;
Also include controller, the controller can make the outer rotaring tube of motorized pulleys rotate by way of wireless remote control, simultaneously
External thread sleeve rotation is driven, jam-packed outer sleeve can move up and down under the restriction of sliding block, so as to jam-packed or loosen outer wall card
Pawl.
9. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 8, it is characterised in that:Clamped in elastoplasticity
Set sense electronicses to overlay piece in layer, the sense electronicses overlay piece can after compression by pressure value by way of being wirelessly transferred
Send controller to;Upper pressure limit value is set in controller, reaches higher limit when sense electronicses overlay the pressure value that piece detects,
Controller can control motorized pulleys to stop the rotation, and complete the clamping process of test specimen.
10. according to a kind of silicone pipes maximum drawbar pull laboratory holder described in claim 9, it is characterised in that:In jam-packed overcoat
Rubber jam-packed ring is fixed in the bottom of cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720693449.XU CN206945435U (en) | 2017-06-15 | 2017-06-15 | Silicone pipes maximum drawbar pull laboratory holder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720693449.XU CN206945435U (en) | 2017-06-15 | 2017-06-15 | Silicone pipes maximum drawbar pull laboratory holder |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206945435U true CN206945435U (en) | 2018-01-30 |
Family
ID=61365435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201720693449.XU Active CN206945435U (en) | 2017-06-15 | 2017-06-15 | Silicone pipes maximum drawbar pull laboratory holder |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN206945435U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108476803A (en) * | 2018-05-16 | 2018-09-04 | 德清绿色阳光农业生态有限公司 | A kind of seedling-raising cup clamp device |
CN111289363A (en) * | 2020-03-12 | 2020-06-16 | 河北瑞志交通技术咨询有限公司 | Clamp for silicon core pipe tensile test and test method thereof |
-
2017
- 2017-06-15 CN CN201720693449.XU patent/CN206945435U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108476803A (en) * | 2018-05-16 | 2018-09-04 | 德清绿色阳光农业生态有限公司 | A kind of seedling-raising cup clamp device |
CN111289363A (en) * | 2020-03-12 | 2020-06-16 | 河北瑞志交通技术咨询有限公司 | Clamp for silicon core pipe tensile test and test method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN207163811U (en) | Glass fiber reinforcement muscle stretching clamp | |
CN206945435U (en) | Silicone pipes maximum drawbar pull laboratory holder | |
CN201681020U (en) | Fixture for toroidal tensile test of thin pipe | |
CN204405372U (en) | Water quality monitoring sampler | |
CN106365087A (en) | Cap screwing machine | |
CN205157136U (en) | Pipe joint air tightness detection device | |
CN207114318U (en) | A kind of cable use for laboratory test of elongation rate instrument | |
CN211387517U (en) | Fixing device for steel pipe welding | |
CN207439822U (en) | Fabric strength tester with gauge control function | |
CN206540563U (en) | A kind of support meanss detected for pressure pipeline | |
CN206511645U (en) | A kind of hydraulic clamping device for hollow brick | |
CN104729881A (en) | Water quality monitoring sampling device | |
CN107825693A (en) | A kind of plastic tube mouth of pipe extension fixture and application method | |
CN214794228U (en) | Electronic high-temperature pipe tensile testing machine | |
CN204903364U (en) | Simple and easy rubber detects anchor clamps with metal bonding intensity | |
CN203786014U (en) | Silicon-core tube inner wall frictional coefficient measuring device | |
CN216955540U (en) | Ductility testing arrangement of SBS waterproofing membrane | |
CN110823678A (en) | High-temperature tensile test device and method for metal filaments | |
CN214010698U (en) | Tee bend slot pipe fitting gas tightness check out test set | |
CN211059474U (en) | Building engineering construction pipeline connecting device | |
CN103353048A (en) | Transmission-type probe clamping structure and separated double-transmission-type probe clamping structure | |
CN104215399B (en) | Automatic compensating structure for end part sealing of small-diameter straight pipe in air pressure density test | |
CN207046370U (en) | Tyre meeting device | |
CN203336133U (en) | Rapid plugging device | |
CN206038411U (en) | Biggest traction load ware of HDPE silicon core pipe |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |