heavy drill meaning in English
重型凿岩机
Examples
- The heavy drilling apparatus was blown sky high out of the hole with a tremendous roar .
那沉重的钻井设备随着一声惊人的怒吼，脱离井口，飞向高空。 - Model lb fishing cup is a practical and effective tool . during drilling operation , it can be used to recover the heavier drilling cuttings or metal chips which are difficult to be lifted out of the borehole by normal drillig fluid circulation
它是用来捞取钻井过程中正常的泥浆循环无法带出井眼的较重钻屑或金属碎屑的一种实用有效的随钻工具。