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Company introduction
Certification
![](https://static.wixstatic.com/media/4cf1ba_9bd3ec6f8d924ee9b8dd47226171af36~mv2.png/v1/fit/w_244,h_324,q_57/4cf1ba_9bd3ec6f8d924ee9b8dd47226171af36~mv2.png)
Business Registration
![](https://static.wixstatic.com/media/4cf1ba_681e32e2ed164b0b9fc7949861649e77~mv2.jpg/v1/fit/w_243,h_324,q_57/4cf1ba_681e32e2ed164b0b9fc7949861649e77~mv2.jpg)
Venture business confirmation
![](https://static.wixstatic.com/media/4cf1ba_d6d1f988c0fd4d1bbca7e13413db10d1~mv2.jpg/v1/fit/w_244,h_324,q_57/4cf1ba_d6d1f988c0fd4d1bbca7e13413db10d1~mv2.jpg)
Certification of dedicated research and development department
![](https://static.wixstatic.com/media/4cf1ba_0df99d8f7eb14db482768bf3613ec095~mv2.png/v1/fit/w_243,h_324,q_57/4cf1ba_0df99d8f7eb14db482768bf3613ec095~mv2.png)
Factory registration certificate
![](https://static.wixstatic.com/media/4cf1ba_493a8e70fdd8424da8dfbb45fc0545e5~mv2.png/v1/fit/w_244,h_324,q_57/4cf1ba_493a8e70fdd8424da8dfbb45fc0545e5~mv2.png)
Development of expansion joint device
Certificate of Excellent Technology Evaluation Company
Certificate of Excellent Technology Evaluation Company
![](https://static.wixstatic.com/media/4cf1ba_407751962dbb4e21b3322d4c7c7db34c~mv2.png/v1/fit/w_243,h_324,q_57/4cf1ba_407751962dbb4e21b3322d4c7c7db34c~mv2.png)
ISO9001:2015
![](https://static.wixstatic.com/media/4cf1ba_0222c2e0edae406e8712c148c5d18b3d~mv2.png/v1/fit/w_244,h_324,q_57/4cf1ba_0222c2e0edae406e8712c148c5d18b3d~mv2.png)
ISO9001:2015_E
![](https://static.wixstatic.com/media/4cf1ba_84f9381ce0e749ecb10f52c0241f1784~mv2.png/v1/fit/w_243,h_324,q_57/4cf1ba_84f9381ce0e749ecb10f52c0241f1784~mv2.png)
Small Business Technology Market Certificate
(rail joint)
(rail joint)
![](https://static.wixstatic.com/media/4cf1ba_e5446d891c5b44b7bc25f23e32dd0885~mv2.png/v1/fit/w_244,h_324,q_57/4cf1ba_e5446d891c5b44b7bc25f23e32dd0885~mv2.png)
Small Business Technology Market Certificate
(finger joint)
(finger joint)
Patent
![](https://static.wixstatic.com/media/4cf1ba_3f31357ef1bc40caa9202953082d5a41~mv2.jpg/v1/fit/w_244,h_324,q_57/4cf1ba_3f31357ef1bc40caa9202953082d5a41~mv2.jpg)
Patent certificate for variable amount of expansion and contraction type expansion joint
![](https://static.wixstatic.com/media/4cf1ba_6bdb744c52324d48a94d00856d4a6e06~mv2.jpg/v1/fit/w_243,h_324,q_57/4cf1ba_6bdb744c52324d48a94d00856d4a6e06~mv2.jpg)
Patent certificate for bridge expansion joint with improved watertightness
![](https://static.wixstatic.com/media/4cf1ba_549bc35ba3594ed09cf0501319e7018e~mv2.png/v1/fit/w_244,h_324,q_57/4cf1ba_549bc35ba3594ed09cf0501319e7018e~mv2.png)
Tapered core anchor socket design registration
![](https://static.wixstatic.com/media/4cf1ba_0c4b76b6a56c47d2ac0665dcc0946383~mv2.jpg/v1/fit/w_243,h_324,q_57/4cf1ba_0c4b76b6a56c47d2ac0665dcc0946383~mv2.jpg)
Tapered core anchor socket patent registration
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