短語詞組短語directional collapse blasting 定曏坍塌directional fracturing blasting 定曏斷裂爆破borehole directional fracture blasting 巖石定曏斷裂爆破directional controlled blasting 定曏控制爆破directional pinpoint blasting 定曏拋擲爆破directional throw blasting 定曏爆破;定曏拋擲爆破directional breaking blasting 定曏斷裂爆破directional demolition blasting 定曏爆破拆除directional breaking blasting technology 定曏斷裂爆破技術(shù) 返回 directional blasting