This paper briefly introduces the application of pin timbering of full coal road in "islet faces".

文章对“孤岛面”全煤巷锚杆支护技术应用做了简要介绍。

youdao

This paper briefly introduces the application of pin timbering of full coal road in "islet faces".

文章对“孤岛面”全煤巷锚杆支护技术应用做了简要介绍。

youdao