entry pillar 中文意思是什麼
entry pillar
解釋
平巷煤柱-
Technology of mining without pillar for level entry in much thicker inclined coal seam
淺談特厚易燃煤層水平布置巷道無煤柱開采技術 -
Bolt with bar and wire mesh cable supporting in driving gob - side entry along water - immersed pillar
水浸煤柱沿空掘巷的錨梁網索支護 -
Application of bolting with wire pillar supporting technology in driving along gob - side entry
錨笆柱支護技術在沿空掘巷中的應用
分享友人