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一种改良的W型沉管隧道二次防水接头

Release Time:2019-03-09  Hits:

First Author: Wang Zhengzheng

Disigner of the Invention: 姜涛,郭翔宇,张哲

Application Number: CN201410840857.4

Authorization Date: 2014-12-29

Authorization Number: CN104631494A

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