近几年来,又再度使用了裂缝掏槽.During recent years the seam cut has once again come into use.掏槽方式及布孔参数影响着掘进效率和成本.The cut way and hole parameters affect the drivage efficiency and cost.严重突出煤层掘进水力掏槽防突措施在国际上是一种防突新技术.Grave protrusion coal ...
He learned right off the bat that you can't count on anything in this business.他立刻明白在这一行业中不能依靠任何东西。He maliciously damaged a car with a baseball bat.他用棒球棒恶意损毁了一辆汽车。It's absolutely ridiculous having us bat out th...