【摘要】 大量事实已证明单喷嘴和双喷嘴有好的净化效果,我们从中选出几种常用组合作分析,以便找出其中净化效果最好的组合,为改进单牙轮钻头水力系统设计提供合理方案。更多还原

【Abstract】 It is testified by many facts that single nozzle and dual nozzles have a good clean effect. We study some kinds that are often used. In order to find out the best kind, we can give some good advice to the water system design of one-cone bit.更多还原