短語(yǔ)詞組短語(yǔ)long -hole caving 深孔崩鑛long spiral hole 長(zhǎng)螺鏇鑽機(jī)Long open hole drilling 長(zhǎng)裸眼鑽井long tapered hole 長(zhǎng)錐孔long horizontal hole 水平長(zhǎng)鑽孔long bore hole drilling 長(zhǎng)鑽孔施工long bore hole blasting 長(zhǎng)孔爆破 返回 long hole