core drill bit

基本解釋

A new type of thin-wall diamond core drill bit is developed through the analysis of drilling feature on the R.
通過對在鋼筋混疑土、花崗巖等建筑物上鉆孔特點的分析，本文設(shè)計了一種新型的取芯式薄壁金鋼石鉆頭。
A new type of thin-wall diamond core drill bit is developed through the analysis of drilling feature on the R. C and granite structures.
通過對在鋼筋混疑土、花崗巖等建筑物上鉆孔特點的分析，本文設(shè)計了一種新型的取芯式薄壁金鋼石鉆頭。
The core drilling method and the obtained achievement are introduced with respect to the bit and core barrel used in different formation.
根據(jù)不同地層所采用的鉆頭和取心器，介紹了不同地層的鉆進取心方法和取得的成果。