机械钻 meaning in English
power auger
power drill
Examples
- Standard practice for mechanical auger sampling
机械钻抽样的标准实施规范 - Average rate of penetration
平均机械钻速 - Rop ? rate of penetrate
机械钻速 - Rop rate of penetrate
机械钻速 - But now the use of the spherical one - cone bit shows that the teeth are abrade heavily in advance , which affects the velocity and life of the bit
但是目前油田上使用的球形单牙轮钻头由于牙齿先期磨损严重，影响了钻头的机械钻速和寿命。