走向长壁后退式开采工作面用风帘控制粉尘和瓦斯简单易行，能够解决生产中的实际问题。

It's easy and useful to control dust and gas with wind-cloth curtains in the bringing back long wall face.

youdao

走向长壁后退式开采工作面用风帘控制粉尘和瓦斯简单易行，能够解决生产中的实际问题。

It's easy and useful to control dust and gas with wind-cloth curtains in the bringing back long wall face.

youdao