CN113733287A - Preparation process of degradable drainage plate - Google Patents
Preparation process of degradable drainage plate Download PDFInfo
- Publication number
- CN113733287A CN113733287A CN202110588611.2A CN202110588611A CN113733287A CN 113733287 A CN113733287 A CN 113733287A CN 202110588611 A CN202110588611 A CN 202110588611A CN 113733287 A CN113733287 A CN 113733287A
- Authority
- CN
- China
- Prior art keywords
- fiber
- degradable
- plate
- parts
- preparation process
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention provides a preparation process of a degradable drainage plate, which comprises the following steps: s10, preparing raw materials, and preparing the required raw materials in advance; wheat straw, corn straw, bamboo fiber, pine fiber, coconut fiber, abaca fiber and rice hull powder; s20, preparing mixed plant fibers, and mixing the prepared raw materials according to a certain ratio to obtain the plant fibers; s30, pressing into a plate, namely uniformly mixing the proportioned plant fiber and the solid adhesive, and then putting the mixture into a forming device for pressing into a plate to obtain a degradable plate; s40, coating a filter screen, coating the surface of the obtained degradable plate body with a layer of filter screen, and finally obtaining the degradable drainage plate. The drainage plate manufactured by the preparation process provided by the invention can meet the hardness requirement of the drainage plate, can be smoothly inserted into the ground for drainage, is degraded after several months, and has good environmental protection effect.
Description
Technical Field
The invention relates to the technical field of drainage plates, in particular to a preparation process of a degradable drainage plate.
Background
All concave-convex hollow stud structures of the drainage plate can quickly and effectively lead out rainwater, so that hydrostatic pressure of the waterproof layer is greatly reduced or even eliminated, and the active waterproof effect can be achieved through the active water guide principle. The drainage plate can effectively protect structures and a waterproof layer and resist various acids and bases in soil and root pricks of plants. When the basement outer wall is backfilled, the waterproof layer can protect buildings and the waterproof layer from being damaged.
The plate body of the drainage plate is made of plastic materials, and can be nondegradable and pollute the environment after being inserted into a low position for use, and the plastic drainage plate is always underground and easily causes foundation subsidence.
Disclosure of Invention
The invention aims to provide a preparation process of a degradable drainage plate, which aims to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a degradable drainage plate comprises the following steps:
s10, preparing raw materials, and preparing the required raw materials in advance; wheat straw, rice straw, corn straw, bamboo fiber, pine fiber, coconut fiber, abaca fiber, rice hull powder and starch;
s20, preparing mixed plant fibers, and mixing the prepared raw materials according to a certain ratio to obtain the plant fibers;
s30, pressing into a plate, namely uniformly mixing the proportioned plant fiber and the solid adhesive, and then putting the mixture into a forming device for pressing into a plate to obtain a degradable plate;
s40, coating a filter screen, coating the surface of the obtained degradable plate body with a layer of filter screen, and finally obtaining the degradable drainage plate.
In step S20, the raw materials include, by mass, 12-17 parts of wheat straw, 10-15 parts of rice straw, 15-20 parts of corn straw, 6-11 parts of bamboo fiber, 20-25 parts of pine fiber, 5-13 parts of coconut fiber, 10-17 parts of abaca fiber, 4-12 parts of rice hull powder, and 5-10 parts of starch.
In step S30, the mixture ratio of the plant fiber and the solid adhesive is 65-75% by mass of the plant fiber and 25-35% by mass of the solid adhesive.
As a modification of the present invention, in step S40, the screen is made of waste hemp material.
As a modification of the present invention, in step S30, the method further includes a process for checking the mixing tightness of the plant fiber and the solid adhesive, including the following steps:
s31, carrying out light scanning on the degradable plate body formed by the pressing plate to obtain an inspection picture, and generating a contour figure for mixed tightness inspection from the inspection picture;
s32, grading the outline graph according to the outline width;
s33, parametrizing the outline width of each level of outline graph according to the graded outline graph;
the parametrization of the outline width of the outline graph specifically comprises the following steps:
s331, taking the longest side of the outline graph as the transverse direction, taking the width of the outline graph as the longitudinal direction, taking the abscissa at the intersection point of the longest side of the outline graph as zero, determining a plurality of intercepted abscissas from the zero coordinate, and sequentially increasing the value of each intercepted abscissa;
s332, reading the width of the outline graph corresponding to the intercepted abscissa;
s333, counting the width of the read corresponding outline graph, taking the minimum width value as the minimum value of the edge truncation, and making all width values into a trend graph;
s334, determining the abscissa of each inflection point of the trend curve from the trend graph;
s335, determining a distribution diagram of the profile width parameter according to the abscissa of the inflection point, and removing a mixed loose area of the plant fiber and the solid adhesive according to the distribution diagram.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
A preparation process of a degradable drainage plate comprises the following steps:
s10, preparing raw materials, and preparing the required raw materials in advance; wheat straw, rice straw, corn straw, bamboo fiber, pine fiber, coconut fiber, abaca fiber, rice hull powder and starch;
s20, preparing mixed plant fibers, and mixing the prepared raw materials according to a certain ratio to obtain the plant fibers;
s30, pressing into a plate, namely uniformly mixing the proportioned plant fiber and the solid adhesive, and then putting the mixture into a forming device for pressing into a plate to obtain a degradable plate;
s40, coating a filter screen, coating the surface of the obtained degradable plate body with a layer of filter screen, and finally obtaining the degradable drainage plate.
In step S20, the raw materials include, by mass, 12-17 parts of wheat straw, 10-15 parts of rice straw, 15-20 parts of corn straw, 6-11 parts of bamboo fiber, 20-25 parts of pine fiber, 5-13 parts of coconut fiber, 10-17 parts of abaca fiber, 4-12 parts of rice hull powder, and 5-10 parts of starch.
As an embodiment of the present invention, in step S30, the mixture ratio of the plant fiber and the solid adhesive is 65% to 75% by mass of the plant fiber and 25% to 35% by mass of the solid adhesive.
As an embodiment of the present invention, in step S40, the screen is made of waste hemp material.
As an embodiment of the present invention, in step S30, the method further includes a process for checking the mixing tightness of the plant fiber and the solid adhesive, including the following steps:
s31, carrying out light scanning on the degradable plate body formed by the pressing plate to obtain an inspection picture, and generating a contour figure for mixed tightness inspection from the inspection picture;
s32, grading the outline graph according to the outline width;
s33, parametrizing the outline width of each level of outline graph according to the graded outline graph;
the parametrization of the outline width of the outline graph specifically comprises the following steps:
s331, taking the longest side of the outline graph as the transverse direction, taking the width of the outline graph as the longitudinal direction, taking the abscissa at the intersection point of the longest side of the outline graph as zero, determining a plurality of intercepted abscissas from the zero coordinate, and sequentially increasing the value of each intercepted abscissa;
s332, reading the width of the outline graph corresponding to the intercepted abscissa;
s333, counting the width of the read corresponding outline graph, taking the minimum width value as the minimum value of the edge truncation, and making all width values into a trend graph;
s334, determining the abscissa of each inflection point of the trend curve from the trend graph;
s335, determining a distribution diagram of the profile width parameter according to the abscissa of the inflection point, and removing a mixed loose area of the plant fiber and the solid adhesive according to the distribution diagram.
In one embodiment, the specific steps are as follows:
s10, preparing raw materials, and preparing the required raw materials in advance; wheat straw, corn straw, bamboo fiber, pine fiber, coconut fiber, abaca fiber and rice hull powder;
s20, preparing mixed plant fibers, and mixing the prepared raw materials according to a certain ratio to obtain the plant fibers; the proportion of each raw material is 12 parts of wheat straw, 10 parts of rice straw, 15 parts of corn straw, 6 parts of bamboo fiber, 20 parts of pine fiber, 5 parts of coconut fiber, 10 parts of abaca fiber, 4 parts of rice hull powder and 5 parts of starch by mass;
s30, pressing into a plate, namely uniformly mixing the proportioned plant fiber and the solid adhesive, and then putting the mixture into a forming device for pressing into a plate to obtain a degradable plate; the proportion of the plant fiber and the solid adhesive is 65 percent of the plant fiber and 35 percent of the solid adhesive according to the mass percentage;
s40, coating a filter screen, coating the surface of the obtained degradable plate body with a layer of filter screen, and finally obtaining the degradable drainage plate.
In another embodiment, the specific steps are as follows:
s10, preparing raw materials, and preparing the required raw materials in advance; wheat straw, rice straw, corn straw, bamboo fiber, pine fiber, coconut fiber, abaca fiber, rice hull powder and starch;
s20, preparing mixed plant fibers, and mixing the prepared raw materials according to a certain ratio to obtain the plant fibers; the raw materials comprise, by mass, 17 parts of wheat straw, 15 parts of rice straw, 20 parts of corn straw, 11 parts of bamboo fiber, 25 parts of pine fiber, 13 parts of coconut fiber, 17 parts of abaca fiber, 12 parts of rice hull powder and 10 parts of starch;
s30, pressing into a plate, namely uniformly mixing the proportioned plant fiber and the solid adhesive, and then putting the mixture into a forming device for pressing into a plate to obtain a degradable plate; the proportion of the plant fiber and the solid adhesive is 75 percent of the plant fiber and 25 percent of the solid adhesive according to the mass percentage;
s40, coating a filter screen, coating the surface of the obtained degradable plate body with a layer of filter screen, and finally obtaining the degradable drainage plate.
In each of the above embodiments, the mixing of the vegetable fibres with the solid adhesive is critical and can even seriously affect the final quality of the drainage panel. For this purpose, the mixing effect of the two is monitored at any time. At present, no specific method is available for accurately detecting the mixed bonding effect between the raw material of the drain board and the solid adhesive. The inspection method provided by the invention adopts an image contrast quantification method for monitoring. Specifically, a certain gap pattern is formed after the two materials are mixed and bonded, and according to quantitative analysis of the gap patterns, whether the mixed bonding effect of the plant fiber and the solid adhesive meets the requirement or not can be determined laterally.
The drainage plate manufactured by the preparation process provided by the invention can meet the hardness requirement of the drainage plate, can be smoothly inserted into the ground for drainage, is degraded after several months, and has good environmental protection effect.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. A preparation process of a degradable drainage plate is characterized by comprising the following steps:
s10, preparing raw materials, and preparing the required raw materials in advance; wheat straw, rice straw, corn straw, bamboo fiber, pine fiber, coconut fiber, abaca fiber, rice hull powder and starch;
s20, preparing mixed plant fibers, and mixing the prepared raw materials according to a certain ratio to obtain the plant fibers;
s30, pressing into a plate, namely uniformly mixing the proportioned plant fiber and the solid adhesive, and then putting the mixture into a forming device for pressing into a plate to obtain a degradable plate;
s40, coating a filter screen, coating the surface of the obtained degradable plate body with a layer of filter screen, and finally obtaining the degradable drainage plate.
2. The preparation process of the degradable drainage board according to claim 1, wherein the preparation process comprises the following steps: in step S20, the raw materials are composed of, by mass, 12-17 parts of wheat straw, 10-15 parts of rice straw, 15-20 parts of corn straw, 6-11 parts of bamboo fiber, 20-25 parts of pine fiber, 5-13 parts of coconut fiber, 10-17 parts of abaca fiber, 4-12 parts of rice hull powder and 5-10 parts of starch.
3. The preparation process of the degradable drainage board according to claim 1, wherein the preparation process comprises the following steps: in step S30, the mixture ratio of the plant fiber and the solid adhesive is 65-75% by mass of the plant fiber and 25-35% by mass of the solid adhesive.
4. The preparation process of the degradable drainage board according to claim 1, wherein the preparation process comprises the following steps: in step S40, the screen is made of waste hemp material.
5. The preparation process of the degradable drainage board according to claim 1, wherein the preparation process comprises the following steps: in step S30, the method further includes a process for checking the mixing tightness of the plant fiber and the solid adhesive, including the following steps:
s31, carrying out light scanning on the degradable plate body formed by the pressing plate to obtain an inspection picture, and generating a contour figure for mixed tightness inspection from the inspection picture;
s32, grading the outline graph according to the outline width;
s33, parametrizing the outline width of each level of outline graph according to the graded outline graph;
the parametrization of the outline width of the outline graph specifically comprises the following steps:
s331, taking the longest side of the outline graph as the transverse direction, taking the width of the outline graph as the longitudinal direction, taking the abscissa at the intersection point of the longest side of the outline graph as zero, determining a plurality of intercepted abscissas from the zero coordinate, and sequentially increasing the value of each intercepted abscissa;
s332, reading the width of the outline graph corresponding to the intercepted abscissa;
s333, counting the width of the read corresponding outline graph, taking the minimum width value as the minimum value of the edge truncation, and making all width values into a trend graph;
s334, determining the abscissa of each inflection point of the trend curve from the trend graph;
s335, determining a distribution diagram of the profile width parameter according to the abscissa of the inflection point, and removing a mixed loose area of the plant fiber and the solid adhesive according to the distribution diagram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588611.2A CN113733287B (en) | 2021-05-28 | 2021-05-28 | Preparation process of degradable drainage plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588611.2A CN113733287B (en) | 2021-05-28 | 2021-05-28 | Preparation process of degradable drainage plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113733287A true CN113733287A (en) | 2021-12-03 |
| CN113733287B CN113733287B (en) | 2022-10-18 |
Family
ID=78728365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110588611.2A Active CN113733287B (en) | 2021-05-28 | 2021-05-28 | Preparation process of degradable drainage plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113733287B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19835090A1 (en) * | 1998-07-24 | 2000-01-27 | Gfal Ges Zur Foerderung Angewa | Production of cellulose insulating material and image analysis for fault analysis of insulating material obtained using old paper and cardboard also natural fiber material with additives |
| CN101013126A (en) * | 2007-01-15 | 2007-08-08 | 浙江大学 | Method for predicting intensity of wooden artificial panel by computer |
| KR101207895B1 (en) * | 2011-11-04 | 2012-12-04 | 김용수 | Bio-degradable plastic drain board and method of manufacturing the same |
| CN106683093A (en) * | 2017-01-12 | 2017-05-17 | 国家林业局北京林业机械研究所 | Board appearance quality comprehensive quantitative evaluation method |
| CN108398431A (en) * | 2017-12-29 | 2018-08-14 | 北京林业大学 | A kind of device and method of wood materials defects detection |
| CN109627799A (en) * | 2018-12-12 | 2019-04-16 | 江苏中联路基工程有限公司 | A kind of degradable drain bar, material compositions and its preparation process |
| CN110658696A (en) * | 2019-09-30 | 2020-01-07 | 上海华力集成电路制造有限公司 | Photoetching friendliness design checking method for disconnection hot spot |
| CN110653913A (en) * | 2019-08-26 | 2020-01-07 | 江苏中联路基工程有限公司 | Degradable plant drainage plate core and preparation method thereof |
| CN111307732A (en) * | 2020-02-21 | 2020-06-19 | 黎明职业大学 | Method for detecting carbon fiber plate by image scanning |
| CN111413354A (en) * | 2020-05-25 | 2020-07-14 | 广西我的科技有限公司 | Method for detecting surface defects of artificial board |
| CN112837285A (en) * | 2021-01-29 | 2021-05-25 | 山东建筑大学 | Edge detection method and device for panel image |
-
2021
- 2021-05-28 CN CN202110588611.2A patent/CN113733287B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19835090A1 (en) * | 1998-07-24 | 2000-01-27 | Gfal Ges Zur Foerderung Angewa | Production of cellulose insulating material and image analysis for fault analysis of insulating material obtained using old paper and cardboard also natural fiber material with additives |
| CN101013126A (en) * | 2007-01-15 | 2007-08-08 | 浙江大学 | Method for predicting intensity of wooden artificial panel by computer |
| KR101207895B1 (en) * | 2011-11-04 | 2012-12-04 | 김용수 | Bio-degradable plastic drain board and method of manufacturing the same |
| CN106683093A (en) * | 2017-01-12 | 2017-05-17 | 国家林业局北京林业机械研究所 | Board appearance quality comprehensive quantitative evaluation method |
| CN108398431A (en) * | 2017-12-29 | 2018-08-14 | 北京林业大学 | A kind of device and method of wood materials defects detection |
| CN109627799A (en) * | 2018-12-12 | 2019-04-16 | 江苏中联路基工程有限公司 | A kind of degradable drain bar, material compositions and its preparation process |
| CN110653913A (en) * | 2019-08-26 | 2020-01-07 | 江苏中联路基工程有限公司 | Degradable plant drainage plate core and preparation method thereof |
| CN110658696A (en) * | 2019-09-30 | 2020-01-07 | 上海华力集成电路制造有限公司 | Photoetching friendliness design checking method for disconnection hot spot |
| CN111307732A (en) * | 2020-02-21 | 2020-06-19 | 黎明职业大学 | Method for detecting carbon fiber plate by image scanning |
| CN111413354A (en) * | 2020-05-25 | 2020-07-14 | 广西我的科技有限公司 | Method for detecting surface defects of artificial board |
| CN112837285A (en) * | 2021-01-29 | 2021-05-25 | 山东建筑大学 | Edge detection method and device for panel image |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113733287B (en) | 2022-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7694546B2 (en) | Porosity reference standard utilizing one or more hollow, non-cylindrical shafts | |
| CN103424405B (en) | Drought monitoring method based on HJ-1A/1B CCD data | |
| CN107515025B (en) | Ancient city wall disease grade evaluation method | |
| CN106296462B (en) | A kind of existing wind power plant roughness value based on double anemometer tower data determines method | |
| CN113733287B (en) | Preparation process of degradable drainage plate | |
| CN101799430A (en) | Built-in anti-seepage geomembrane damage monitoring method based on optical fiber temperature-measurement principle | |
| CN115880299A (en) | Quality detection system of lightweight concrete composite self-insulation external wall panel | |
| CN106771105A (en) | A kind of method for evaluating asphaltmastic water stability | |
| CN116977116A (en) | Waterproof material production intelligent monitoring management system based on intelligent manufacturing factory | |
| CN115980193A (en) | Plastic concrete compressive strength detection method based on ultrasonic waves | |
| CN106049417A (en) | Method for treating collapsible loess foundation using acid-adding presoaking method | |
| CN108425356B (en) | Loess collapsibility evaluation method based on in-situ test technology | |
| CN206554494U (en) | A kind of build concrete water permeable device | |
| CN206248441U (en) | Concrete springback measuring point positions electrostatic paster | |
| CN209469001U (en) | A kind of building mould | |
| CN116067969A (en) | Nondestructive testing and evaluating method for grouting reinforcement effect of earthen site cracks | |
| CN114414344B (en) | Method for testing performance of concrete structural surface in water environment | |
| Liebisch et al. | Bonded porous revetments–effect of porosity on wave-induced loads and hydraulic performance | |
| CN115094925B (en) | Karst area abrupt slope solidification-stable soil ecological reconstruction method | |
| CN110865172B (en) | Soil test method for determining emergency compaction construction parameters of soft plastic modified soil replacement foundation | |
| CN207439912U (en) | A kind of distress in concrete self-healing detection device | |
| CN113433125A (en) | Soil surface stress-strain test environment box for earthen archaeological site and measurement method thereof | |
| CN2245626Y (en) | Drainage core plate for soil | |
| CN111910613A (en) | Construction method of green energy-saving building | |
| CN216690477U (en) | Geopolymer restoration planting pitched roof crack structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220825 Address after: 224000 east side of Huasheng Company, soft foundation material industrial park, Gangxi Town, Jianhu County, Yancheng City, Jiangsu Province Applicant after: JIANGSU ZHONGLIAN SUBGRADE ENGINEERING Co.,Ltd. Address before: No. 36, group 2, Qili Village, Tanghe sub district office, Jianhu County, Yancheng City, Jiangsu Province Applicant before: Fu Sheng |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |