Release Time:2019-03-09 Hits:
First Author: 冯新
Disigner of the Invention: 周晶
Authorization Date: 2012-12-07
Authorization Number: 201210521369.8
Prev One:一种预应力钢筒混凝土管的插口抗裂结构及其制造方法.
Next One:一种管道几何尺寸的测量机