巷道

yòng yú yùn shū de hàng dào

用于运输的巷道

tunnel for transportation

hàng dào wā jué jī

巷道挖掘机

tunnelling machine

hàng dào mào dǐng hé méi tàn zì rán de yù fáng

巷道冒顶和煤炭自燃的预防

prevention of tunnel fall of ground and coal spontaneous ignition