Blasters in this unit group fill blast holes with explosives and detonate explosives to dislodge coal, ore and rock or to demolish structures.是什么意思_Blasters in this unit group fill blast holes with explosives and detonate explosives to dislodge coal, ore and rock or to demolish structures.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句