core drill bit

基本解释

A new type of thin-wall diamond core drill bit is developed through the analysis of drilling feature on the R.
通过对在钢筋混疑土、花岗岩等建筑物上钻孔特点的分析，本文设计了一种新型的取芯式薄壁金钢石钻头。
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.
通过对在钢筋混疑土、花岗岩等建筑物上钻孔特点的分析，本文设计了一种新型的取芯式薄壁金钢石钻头。
The core drilling method and the obtained achievement are introduced with respect to the bit and core barrel used in different formation.
根据不同地层所采用的钻头和取心器，介绍了不同地层的钻进取心方法和取得的成果。