coaling road meaning in Chinese

加煤线, 上煤线

Probing into gas control techniques in coal road drivage
煤巷掘进瓦斯治理技术探讨
Application of bolt - mesh - spurting supporting technique in soft all - coal road
松软全煤巷道锚网喷支护技术应用
Application of anchorage cable reinforced support in synclinal shaft of coal road
锚索支护在平煤一矿进风石门修复中的应用
Development of the hanger of the monorail hoist runway on the ground coal road with the total bolt support
全锚支护的底煤巷单轨吊车道吊具的研制