一种封底式沉井井壁

Release time:2020-10-30 Hits:

Disigner of the Invention:权晓威,刘晓帅,yuliyuan,蒋斌松

Type of Patent:国际

State of Patent:专利授权

Application Number:201720632568.4

Number of Inventors:5

Service Invention or Not:no

Application Date:2017-06-02

Authorization Date:2017-12-26

First Author:zhangqiang