1) large diameter bit
大口径钻头
1.
The expert system for the design and proper use of large diameter bits is composed of the subexpert systems for the design and proper use of large diameter bits and a graphical data base.
大口径钻头设计与合理使用专家系统，由大口径钻头设计专家系统、大口径钻头合理使用专家系统、大口径电脑图库三部分组成。
2) large diameter diamond core bit
大口径金刚石钻头
3) large diameter combined cone bit
大口径组合牙轮钻头
1.
Based on the practical cases undertaken by author,some problems in application of large diameter combined cone bits are discussed Suggestions on improvement of the bits are proposed in this pape
结合牙轮钻头的结构、性能、工作条件，分析了大口径组合牙轮钻头在使用中出现的问题，并提出了改正措施和建
4) large diameter drill
大口径钻机
5) large-hole drilling
大口径钻探
1.
Point to above mentioned problems, took the drilling operation in unusual deep water table and complicated strata in Shouyang area as an example, the paper described the technology, parameter choice and measures adopted during this large-hole drilling ope.
针对上述问题,以寿阳地区特深水位、复杂地层钻探施工为例,阐述大口径钻探施工的工艺、参数选择、以及采取措施。
6) large drill hole
大口径钻孔
1.
Drilling technology of the large drill hole in complex strata
复杂地层中大口径钻孔的施工方法
补充资料：次大口径成品油管道(见大口径原油管道)
次大口径成品油管道(见大口径原油管道)
small big inch products pipeline
次大口径成品油管道比m“，。彬duet、pipeline)见大。径原油管道。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条