1)green bit,新钻头2)new type of bits,新型钻头3)green bit,新钻头，过热钻头4)bit break-in procedure,新钻头试钻过程5)new type inserted bits,新型镶嵌式钻头6)fresh bit,新修复的钻头
用法例句
The pattern specialty of new type inserted bits and their main technical specifications and application cases are introduced following the drilling techniques and rock characteristics of continental scientific drilling.
