CN108585469A - The preparation method of optical fiber - Google Patents
The preparation method of optical fiber Download PDFInfo
- Publication number
- CN108585469A CN108585469A CN201810833860.1A CN201810833860A CN108585469A CN 108585469 A CN108585469 A CN 108585469A CN 201810833860 A CN201810833860 A CN 201810833860A CN 108585469 A CN108585469 A CN 108585469A
- Authority
- CN
- China
- Prior art keywords
- auxiliary rod
- preform
- optical fiber
- preparation
- thermal insulation
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/207—Uniting glass rods, glass tubes, or hollow glassware
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of preparation methods of optical fiber, include the following steps；1) preform and auxiliary rod are welded together；2) preform after welding is subjected to wire-drawing operation；3) coating solidification is carried out to optical fiber；Wherein, step 1) carries out welding by preform and auxiliary rod fusion splicing devices；Preform includes with auxiliary rod fusion splicing devices：For multiple blowtorch of welding optic fibre prefabricated rods and auxiliary rod, 2 scroll chucks of grip optical fiber prefabricated rods are used for, the thermal insulation ceramics set of fixed auxiliary rod to adjust the regulating device of the position of thermal insulation ceramics set, pedestal, sliding seat and hydraulic push rod；Thermal insulation ceramics set is equipped with shaft orientation laser transmitter；It is separately installed with radial laser emitter on two claws of scroll chuck.It is beneficial in that the preparation method of optical fiber can ensure that the accuracy of docking avoids weld from being bent, avoids due to preform and auxiliary rod welding Bending Influence optical fiber processing.
Description
Technical field
The present invention relates to a kind of preparation methods of optical fiber.
Background technology
Preform can be used to the material preforms of drawing optical fiber, be the core former material of the quartzy series fibre of manufacture
Material.In preform drawing optical fiber, need auxiliary rod being fused to one end of preform to assist drawing optical fiber.It passes
The posetionof weld in welding is inaccurate with preform for the auxiliary rod of system, and weld forms bending after being easy welding, causes to need
Want multiple welding.And it is easy to damage preform in multiple clamping fusion process.
Invention content
To solve the deficiencies in the prior art, the present invention provides one kind capable of ensureing that posetionof weld accuracy avoids weld
The preparation method of the optical fiber of bending.
In order to realize that above-mentioned target, the present invention adopt the following technical scheme that：
A kind of preparation method of optical fiber, includes the following steps；
1) preform and auxiliary rod are welded together；
2) preform after welding is subjected to wire-drawing operation；
3) coating solidification is carried out to optical fiber；
Wherein, step 1) carries out welding by preform and auxiliary rod fusion splicing devices；
Preform includes with auxiliary rod fusion splicing devices：For multiple blowtorch of welding optic fibre prefabricated rods and auxiliary rod,
For 2 scroll chucks of grip optical fiber prefabricated rods, the thermal insulation ceramics set of fixed auxiliary rod adjusts the position of thermal insulation ceramics set
Regulating device, pedestal, sliding seat and hydraulic push rod；Thermal insulation ceramics set is equipped with shaft orientation laser transmitter；Two of scroll chuck
Radial laser emitter is separately installed on claw；Axis of the laser beam of shaft orientation laser transmitter transmitting along preform
Through preform and auxiliary rod；The laser beam of the radial laser transmitter projects of two of same scroll chuck is crossed to form
One intersection point；Hydraulic push rod drives sliding seat to be slided relative to pedestal；Scroll chuck is installed to sliding seat；Thermal insulation ceramics set is socketed in
The periphery of auxiliary rod；Multiple burner rings are around auxiliary rod.
Further, regulating device includes：First linear module and the second linear module；First linear module includes first
Motor and the first slide unit；Second linear module includes the second motor and the second slide unit；Thermal insulation ceramics set is fixed to the first slide unit；The
One linear module is installed to the second slide unit；First motor drives the first slide unit to be moved along first straight line；Second motor driving second
Slide unit is moved along second straight line；The laser beam of first straight line, second straight line and the transmitting of shaft orientation laser transmitter is mutually perpendicular to.
Further, regulating device includes：It is filled relative to the angular adjustment of preform angle for adjusting auxiliary rod
It sets；Angle regulator includes：Support plate and electric pushrod；One end of support plate is rotatablely connected to pedestal；Electric pushrod drives
Support plate is rotated relative to pedestal；Electric pushrod is installed to pedestal；Second linear module is installed to support plate.
Further, angle regulator further includes supporting rod：Supporting rod is fixed to one end of electric pushrod；Supporting rod with
The bottom connection of support plate touches.
Further, angle regulator further includes supporting rack；Support plate is rotatablely connected to supporting rack；Supporting rack is fixed to
Pedestal.
Further, being not installed on the claw of radial laser emitter for scroll chuck is equipped with for shooting laser light
The pick-up lens of line intersection.
Further, preform and auxiliary rod fusion splicing devices further include the laser for adjusting axial laser transmitter projects
The lens of the line footpath of light；Lens are slidingly attached to thermal insulation ceramics set；Lens be set to shaft orientation laser transmitter and auxiliary rod it
Between.
Further, scroll chuck grip optical fiber prefabricated rods；Auxiliary rod is fixed to thermal insulation ceramics set；Sliding seat relative to
Base motion makes preform be moved to the direction close to auxiliary rod；Start shaft orientation laser transmitter and radial Laser emission
Device；The laser beam that the position for adjusting auxiliary rod makes shaft orientation laser transmitter emit sequentially passes through two pairs of radial laser emitter hairs
The intersection point that the laser beam penetrated crosses.
Further, sliding seat makes preform contact auxiliary rod relative to base motion.
Further, it polishes the end face of auxiliary rod and preform being in contact, so that contact surface is smooth.
The invention has the beneficial effects that can be ensured pair by shaft orientation laser transmitter and the positioning of radial laser emitter
The accuracy connect avoids the weld of auxiliary rod and preform from being bent.It avoids due to preform and auxiliary rod welding
Bending Influence optical fiber processing.
Auxiliary rod after determining posetionof weld, is adjusted to by preform with auxiliary rod fusion splicing devices by regulating device
Posetionof weld carries out welding, can avoid clamping welding optic fibre prefabricated rods repeatedly and auxiliary rod to cause to damage to preform
Wound.
Description of the drawings
Fig. 1 is a kind of flow chart of the preparation method of optical fiber of the present invention；
Fig. 2 is the schematic diagram of the preform and auxiliary rod fusion splicing devices applied in the preparation method of optical fiber in Fig. 1；
Fig. 3 is the schematic diagram of the preform and the regulating device of auxiliary rod fusion splicing devices in Fig. 2；
Fig. 4 is the signal of the preform and the scroll chuck grip optical fiber prefabricated rods of auxiliary rod fusion splicing devices in Fig. 2
Figure；
Fig. 5 is the signal of the preform and the radial laser transmitter projects laser of auxiliary rod fusion splicing devices in Fig. 2
Scheme, the joint of two radial laser transmitter projects laser is shown in figure；
Fig. 6 is the schematic diagram of the preform and the blowtorch of auxiliary rod fusion splicing devices in Fig. 2.
Preform and auxiliary rod fusion splicing devices 100, blowtorch 10, scroll chuck 20, shaft orientation laser transmitter 21 are radial
Laser emitter 22, pick-up lens 23, thermal insulation ceramics set 30, regulating device 40, first linear module 41, first motor 411, the
One slide unit 412, the second linear module 42, the second motor 421, the second slide unit 422, angle regulator 43, support plate 431, electricity
Dynamic push rod 432, supporting rod 433, supporting rack 434, pedestal 50, sliding seat 60, hydraulic push rod 70.
Specific implementation mode
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of preparation method of optical fiber, includes the following steps；
1) preform and auxiliary rod are welded together；
2) preform after welding is subjected to wire-drawing operation；
3) coating solidification is carried out to optical fiber；
Wherein, step 1) carries out welding by preform and auxiliary rod fusion splicing devices 100；
As shown in Figures 1 to 6, it is the preform and auxiliary rod fusion splicing devices of the preparation method of the above-mentioned optical fiber of application
100。
Preform and auxiliary rod fusion splicing devices 100, including：10,2 scroll chucks 20 of multiple blowtorch, thermal insulation ceramics
Set 30, regulating device 40, pedestal 50, sliding seat 60 and hydraulic push rod 70.Multiple blowtorch 10 are to preform 201 and auxiliary rod
202 carry out welding.When the posetionof weld of preform 201 and auxiliary rod 202 determines, multiple blowtorch 10 are from multiple directions pair
Posetionof weld heating melting is to carry out welding, as shown in Figure 5.Blowtorch 10 is from multiple directions to preform 201 and auxiliary
Help the carry out welding of stick 202 that can ensure to be heated evenly in posetionof weld circumferential direction so that the welding in circumferential direction is uniform.2 three-jaws
Chuck 20 is used for grip optical fiber prefabricated rods 201.Thermal insulation ceramics set 30 is for fixing auxiliary rod 202.Regulating device 40 is for adjusting
The position of thermal insulation ceramics set 30 is to adjust the position of auxiliary rod 202.Scroll chuck 20 is installed to sliding seat 60.Hydraulic push rod 70
Driving sliding seat 60 is slided the preform 201 for driving scroll chuck 20 to be clamped relative to pedestal 50 and is slided.Heat-insulated pottery
Insulator 30 is socketed in the periphery of auxiliary rod 202.Multiple blowtorch 10 are around auxiliary rod 202.
Thermal insulation ceramics set 30 is equipped with shaft orientation laser transmitter 21.It is installed respectively on two claw 20a of scroll chuck 20
There is radial laser emitter 22.The laser beam that shaft orientation laser transmitter 21 emits runs through light along the axis of preform 201
Fine prefabricated rods 201 and auxiliary rod 202.The laser beam intersection that the radial laser emitter 22 of two of same scroll chuck 20 emits
Form an intersection point.The laser beam that two radial laser emitters 22 of scroll chuck 20 respective two emit is crossed to form respectively
Two intersection points.
Specifically, auxiliary rod 202 is fixed on thermal insulation ceramics set 30.Thermal insulation ceramics set 30 is adjusted by regulating device 40
With the position of auxiliary rod 202, until shaft orientation laser transmitter 21 emit laser beam simultaneously pass through two above-mentioned intersection points.This
When preform 201 and auxiliary rod 202 be in the state that is just being aligned.Preform 201 is aligned and contacts and auxiliary rod
202, which is posetionof weld.Hydraulic push rod 70 drives the sliding of 60 opposite base 50 of sliding seat, to drive optical fiber prefabricating
Stick 201 is moved to auxiliary rod 202 along a straight line, until one end of the end thereof contacts auxiliary rod 202 of preform 201.Start
Multiple blowtorch 10 carry out welding to preform 201 and auxiliary rod 202.As a kind of specific embodiment, to auxiliary rod
202 and the end face being in contact of preform 201 polish so that contact surface is smooth.
As a preferred embodiment, regulating device 40 includes：First linear module 41 and the second linear module 42.
First linear module 41 includes first motor 411 and the first slide unit 412.Second linear module 42 includes the second motor 421 and the
Two slide units 422.Thermal insulation ceramics set 30 is fixed to the first slide unit 412.First linear module 41 is installed to the second slide unit 422.When
Two slide units 422 can drive the thermal insulation ceramics on the first slide unit 412 to cover 30 and move synchronously when moving.Specifically, first motor 411
The first slide unit 412 is driven to move to adjust position of the auxiliary rod 202 in first straight line along first straight line.Second motor 421
The second slide unit 422 is driven to move to adjust position of the auxiliary rod 202 in second straight line along second straight line.First straight line,
The laser beam that two straight lines and shaft orientation laser transmitter 21 emit is mutually perpendicular to.By to thermal insulation ceramics set 30 and auxiliary rod 202
Position be adjusted, enable shaft orientation laser transmitter 21 along preform 201 axis run through 201 He of preform
Auxiliary rod 202.With this, makes the laser beam of the transmitting of shaft orientation laser transmitter 21 while passing through two above-mentioned intersection points, realize molten
Connect positioning.
As a preferred embodiment, regulating device 40 further includes：Angle regulator 43.Angle regulator 43
Adjustable angle of the auxiliary rod 202 relative to preform 201, so that shaft orientation laser transmitter 21 can be along preform
201 axis runs through preform 201 and auxiliary rod 202.Specifically, angle regulator 43 includes：431 He of support plate
Electric pushrod 432.Second linear module 42 is installed to support plate 431.One end of support plate 431 is rotatablely connected to pedestal 50.Electricity
Dynamic push rod 432 drives support plate 431 to be rotated relative to pedestal 50 to drive the second linear module 42 to be rotated relative to pedestal 50.Together
When, the auxiliary rod 202 for being fixed on the second linear module 42 is rotated also relative to pedestal 50, opposite to auxiliary rod 202 to realize
In the adjusting of the angle of preform 201.Electric pushrod 432 is installed to pedestal 50.
As a preferred embodiment, angle regulator 43 further includes supporting rod 433：Supporting rod 433 is fixed to
One end of electric pushrod 432；Supporting rod 433 and the bottom connection of support plate 431 touch.
As a preferred embodiment, angle regulator 43 further includes supporting rack 434；The rotation of support plate 431 connects
It is connected to supporting rack 434；Supporting rack 434 is fixed to pedestal 50.
As a preferred embodiment, the claw 20a for being not installed with radial laser emitter 22 of scroll chuck 20
On pick-up lens 23 for shooting laser beam intersection is installed.The image shot by pick-up lens 23 can observe axis
Whether the laser beam emitted to laser emitter 21 passes through two above-mentioned intersection points simultaneously.If shaft orientation laser transmitter 21 emits
Laser beam do not pass through two above-mentioned intersection points simultaneously, then need to continue to adjust preform 201 and auxiliary rod 202
Position.
As a preferred embodiment, preform further includes adjusting axially to swash with auxiliary rod fusion splicing devices 100
The lens of the line footpath for the laser beam that optical transmitting set 21 emits.Lens are slidingly attached to thermal insulation ceramics set 30.Lens are set to axis
To between laser emitter 21 and auxiliary rod 202.
It is sayed based on above-mentioned, the preparation method of optical fiber is further comprising the steps of：
20 grip optical fiber prefabricated rods of scroll chuck；
Auxiliary rod is fixed to thermal insulation ceramics set；
Sliding seat 60 is moved relative to pedestal 50 makes preform be moved to the direction close to auxiliary rod；
Start shaft orientation laser transmitter 21 and radial laser emitter 22；
The laser beam that the position for adjusting auxiliary rod makes shaft orientation laser transmitter 21 emit sequentially passes through two pairs of radial laser
The intersection point that the laser beam that transmitter 22 emits crosses.
The temperature of optical fiber hot melting furnace is 1950 DEG C~2050 DEG C.The linear velocity of wire drawing is 980~1050m/min.
Specifically, sliding seat 60 makes preform contact auxiliary rod relative to the movement of pedestal 50.
Specifically, polishing the end face of auxiliary rod and preform being in contact, so that contact surface is smooth.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (10)
1. a kind of preparation method of optical fiber, which is characterized in that include the following steps；
1) preform and auxiliary rod are welded together；
2) preform after welding is subjected to wire-drawing operation；
3) coating solidification is carried out to optical fiber；
Wherein, step 1) carries out welding by preform and auxiliary rod fusion splicing devices；
The preform includes with auxiliary rod fusion splicing devices：For multiple blowtorch of welding optic fibre prefabricated rods and auxiliary rod,
For 2 scroll chucks of grip optical fiber prefabricated rods, the thermal insulation ceramics set of the fixed auxiliary rod adjusts the thermal insulation ceramics set
Position regulating device, pedestal, sliding seat and hydraulic push rod；The thermal insulation ceramics set is equipped with shaft orientation laser transmitter；Institute
It states and is separately installed with radial laser emitter on two claws of scroll chuck；The laser light of the shaft orientation laser transmitter transmitting
Line runs through the preform and the auxiliary rod along the axis of the preform；Two of the same scroll chuck
The laser beam of the radial direction laser transmitter projects is crossed to form an intersection point；The hydraulic push rod drives the sliding seat opposite
It is slided in the pedestal；The scroll chuck is installed to the sliding seat；The thermal insulation ceramics set is socketed in the auxiliary rod
Periphery；Multiple burner rings are around the auxiliary rod.
2. the preparation method of optical fiber according to claim 1, which is characterized in that
The regulating device includes：First linear module and the second linear module；The first linear module includes first motor
With the first slide unit；The second linear module includes the second motor and the second slide unit；The thermal insulation ceramics set is fixed to described
One slide unit；The first linear module is installed to second slide unit；The first motor drives first slide unit along first
Linear motion；Second motor drives second slide unit to be moved along second straight line；The first straight line, the second straight line
It is mutually perpendicular to the laser beam of shaft orientation laser transmitter transmitting.
3. the preparation method of optical fiber according to claim 2, which is characterized in that
The regulating device includes：For adjusting angle regulator of the auxiliary rod relative to preform angle；The angle
Spending regulating device includes：Support plate and electric pushrod；One end of the support plate is rotatablely connected to the pedestal；It is described electronic to push away
Bar drives the support plate to be rotated relative to the pedestal；The electric pushrod is installed to the pedestal；The second linear mould
Group is installed to the support plate.
4. the preparation method of optical fiber according to claim 3, which is characterized in that
The angle regulator further includes supporting rod：The supporting rod is fixed to one end of the electric pushrod；The support
Bar and the bottom connection of the support plate touch.
5. the preparation method of optical fiber according to claim 3, which is characterized in that
The angle regulator further includes supporting rack；The support plate is rotatablely connected to support frame as described above；Support frame as described above is solid
The fixed extremely pedestal.
6. the preparation method of the optical fiber according to claim 1 to 5 any one, which is characterized in that
Being not installed on the claw of the radial laser emitter for the scroll chuck is equipped with for shooting laser beam friendship
Pick-up lens at remittance.
7. the preparation method of the optical fiber according to claim 1 to 5 any one, which is characterized in that
The preform further includes the laser beam for adjusting the shaft orientation laser transmitter transmitting with auxiliary rod fusion splicing devices
Line footpath lens；The lens are slidingly attached to the thermal insulation ceramics set；The lens are set to the shaft orientation laser transmitting
Between device and the auxiliary rod.
8. the preparation method of optical fiber according to claim 1, which is characterized in that further comprising the steps of；
The scroll chuck grip optical fiber prefabricated rods；
Auxiliary rod is fixed to thermal insulation ceramics set；
The sliding seat makes preform be moved to the direction close to auxiliary rod relative to the base motion；
Start the shaft orientation laser transmitter and the radial laser emitter；
The laser beam that the position for adjusting auxiliary rod makes the shaft orientation laser transmitter emit sequentially passes through two pairs of radial directions and swashs
The intersection point that the laser beam of optical transmitting set transmitting crosses.
9. the preparation method of optical fiber according to claim 1, which is characterized in that further comprising the steps of；
The sliding seat makes the preform contact the auxiliary rod relative to the base motion.
10. the preparation method of optical fiber according to claim 1, which is characterized in that further comprising the steps of；
It polishes the end face of auxiliary rod and preform being in contact, so that contact surface is smooth.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011354691.7A CN112521000B (en) | 2018-07-26 | 2018-07-26 | Fusion welding device for optical fiber preform and auxiliary rod |
| CN201810833860.1A CN108585469B (en) | 2018-07-26 | 2018-07-26 | Method for producing optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833860.1A CN108585469B (en) | 2018-07-26 | 2018-07-26 | Method for producing optical fiber |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011354691.7A Division CN112521000B (en) | 2018-07-26 | 2018-07-26 | Fusion welding device for optical fiber preform and auxiliary rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108585469A true CN108585469A (en) | 2018-09-28 |
| CN108585469B CN108585469B (en) | 2021-02-12 |
Family
ID=63618838
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011354691.7A Active CN112521000B (en) | 2018-07-26 | 2018-07-26 | Fusion welding device for optical fiber preform and auxiliary rod |
| CN201810833860.1A Active CN108585469B (en) | 2018-07-26 | 2018-07-26 | Method for producing optical fiber |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011354691.7A Active CN112521000B (en) | 2018-07-26 | 2018-07-26 | Fusion welding device for optical fiber preform and auxiliary rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN112521000B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940908A (en) * | 2020-08-25 | 2020-11-17 | 烟台大学 | Micro-texture processing equipment for deep brain stimulation sleeve electrode |
| CN111940909A (en) * | 2020-08-25 | 2020-11-17 | 烟台大学 | Platform for preparing micro-texture of deep brain stimulation sleeve electrode |
| CN113636746A (en) * | 2019-07-15 | 2021-11-12 | 富通集团（嘉善）通信技术有限公司 | Optical fiber perform's butt fusion equipment |
| CN117342785A (en) * | 2023-12-06 | 2024-01-05 | 深圳市天域方兴科技有限公司 | Fusion monitoring method and system for master batch rod in optical fiber capillary production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111940908B (en) * | 2020-08-25 | 2021-11-16 | 烟台大学 | Micro-texture processing equipment for deep brain stimulation sleeve electrode |
| CN117342785A (en) * | 2023-12-06 | 2024-01-05 | 深圳市天域方兴科技有限公司 | Fusion monitoring method and system for master batch rod in optical fiber capillary production |
| CN117342785B (en) * | 2023-12-06 | 2024-02-09 | 深圳市天域方兴科技有限公司 | Fusion monitoring method and system for master batch rod in optical fiber capillary production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112521000B (en) | 2022-06-10 |
| CN108585469B (en) | 2021-02-12 |
| CN112521000A (en) | 2021-03-19 |
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