2) diamond oil drill bit
金刚石石油钻头
3) petroleum rock bits
石油全面钻头
5) oil jumper joint steel
石油钻杆接头用钢
1.
In this paper,some samples were taken while smelting 37CrMnMo oil jumper joint steel and quantitative and qualitative examinations of inclusions were carried out.
通过对石油钻杆接头用钢37CrMnMo冶炼过程现场取样,对试样中的夹杂物进行定量和定性分析,确定了该钢种夹杂物控制改进措施。
6) rock bit
岩石钻头
1.
Test research of drilling force for XYZ series rock bit;
XYZ系列岩石钻头钻削力试验研究
补充资料：美国石油学会标准(见美国石油学会)
美国石油学会标准(见美国石油学会)
standards of API: see American Petroleum Institute; API
Me心旧shl体川为拍hui共国石油学会标准bi0Ozhun (standaxdsofAPI)见美一一，L刀‘2‘
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