This paper introduces advantages, formula, and actual use of bi-defensive plastic flat nets for mines.

介绍矿用双抗塑料平网的优势，配方及使用。

youdao

This paper introduces advantages, formula, and actual use of bi-defensive plastic flat nets for mines.

介绍矿用双抗塑料平网的优势，配方及使用。

youdao