Zobrazeno 1 - 1
of 1
pro vyhledávání: '"top coal carving in roadway"'
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 3, Pp 233-240 (2023)
Regarding the problem of “key 4% coal seam which is difficult to realize mechanized mining”, it mainly refers to the mechanized mining method of steeply inclined thin and medium thick coal seam with dip angle greater than 60°. For the first time
Externí odkaz:
https://doaj.org/article/cee2c20b2bfa4c4e9f708e1df96d1936
