短語詞組短語bench cut blasting 階段爆破;梯段爆破high bench cast blasting 高臺階拋擲爆破height bench cast blasting 高臺階拋擲爆破bench h blasting 階梯式爆破open medium -hole bench cut blasting 露天深孔臺階爆破Inclined bench blasting experiment 斜面臺階爆破試驗strip mine bench blasting 露天臺階爆破bench blasting parameters 臺階爆破參數long hole bench blasting 深孔臺階爆破 返回 bench blasting