First use and adopt the new technology of soft rock supporting, especially roadway floor bolting casting reinforcement.

开创了软岩支护尤其是巷道底板锚注加固新技术。

youdao

First use and adopt the new technology of soft rock supporting, especially roadway floor bolting casting reinforcement.

开创了软岩支护尤其是巷道底板锚注加固新技术。

youdao