短語詞組短語deep borehole control blasting 深孔控制爆破protecting borehole wall blasting 護壁爆破shallow borehole smooth blasting technology 淺孔光爆技術(shù)medium deep borehole smooth blasting 中深孔光面爆破underwater borehole blasting 水下炮孔爆破borehole directional fracture blasting 巖石定向斷裂爆破deep borehole blasting 深孔控制爆破protecting borehole wall smooth blasting 護壁光面爆破 返回 borehole blasting