短語詞組短語underground engineering blasting 地下工程爆破underground blasting shock wave 井下爆破空氣沖擊波underground deep hole blasting 地下深孔爆破Open The Underground Blasting 露天地下爆破Underground Mine Drilling and Blasting 井下鑿巖爆破underground deep -hole blasting 井下深孔爆破blasting of underground cavern 地下洞室爆破medium -longhole blasting in underground mine 地下鑛中深孔爆破 返回 underground blasting