钻孔速度 meaning in English

drilling rate
drilling speed
penetration rate of drilling

1 it has great drilling capability , wide range of application , rapid drilling speed and high drilling efficiency , as well as powerful ability of eliminating accident
二钻机特点1钻机钻进能力强，适用范围广钻孔速度快，处理事故能力强，钻进效率高。
And it is worthy to say that this method is very simple to realize and suits for practical blasting engineering . 2 . a new rock , classification based the rock drillability is discussed , which involves fuzzy integrated judge method and the affecting factors of drilling
( 2 )以岩石本身的可钻性为依据，兼顾考虑到其他影响钻机钻孔速度的各种因素，采用模糊综合评判的方法对通过钻孔实时获得其性质的岩石进行分级。
A new method of gaining the characters of rock and soil from the blasting drilling is studied , which is different from general methods and more economic and accurate than them . and a new rock classification is discussed , which involves fuzzy integrated judge method and the affecting factors of drilling
为更好地进行后期的爆破设计如炸药与岩石的优化匹配等，本文综合考虑各种影响钻机钻孔速度的因素，首次提出了采用模糊综合评判的方法对钻孔中获取其性质的岩石进行分级。