...钻孔作业 英文名称： Construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling work 页数： 8 采用标准： 被替代标准： 归口单位： 引用标准： 分类号： 发布日期： 实施日期： 起草单位： 在线...
The noise sources of drilling production are analysed. The noise from main station of normal drillingwork is also investigated in this paper.
本文对钻井生产的噪声源进行了分析，同时也对正常钻井作业时的主要岗位点的噪声进行了调查。
2
The perfect performance of the DBS drilling rig extends life of drill bit, enhances drilling speed and makes the drillingwork more secure and scientific.
DBS钻机性能优良，能延长钻头使用寿命，提高机械钻速，并使钻井更安全、科学。
3
The driller adopts truck power and technical method of foam drilling, which solves the problems of deficiency of water source and electrical source in field drillingwork.