1) drilling cost
打钻费
2) drillhole
打钻
1.
It has been approved that the optimization of feeding pressure,drilling rate and drilling speed is the key to deepen holes and work safely under the condition of certain drilling machine and drillhole design.
为了避免在松软煤层中打深孔引发煤与瓦斯突出等灾害,保证施工安全,根据孔周围的应力应变分布规律,分析了松软煤层打钻时经常遇到的问题,总结了钻进工艺和参数与深孔成孔的密切联系,提出了打深孔的工艺措施和参数。
3) drilling and spraying holes
打钻喷孔
4) umbrella drilling
伞钻打眼
5) water for drilling supply
打钻供水
6) Boring and exploration review water
打钻探水
补充资料：钻钻
1.以铁制刑具束颈﹑凿去髌骨的一种酷刑。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条