What we have done in this paper is of great significance in designing the heavy rock drill to drill deep and large diameter hole.
为大孔径深孔凿岩的重型液压凿岩机的研究与研发打下理论和实践基础。
Dig a hole, about twice as large as the diameter of the flower's pot.
挖一个洞，洞的大小约是花盆的直径的两倍大。
The applications of large diameter manual hole digging pile in different engineering geological conditions are discussed based upon design examples.
通过设计实例，从理论上探讨了大直径人工挖孔桩在建筑基础设计中的应用。
The advantage of digging large diameter stake hole by manpower and its vertical bearing capacity calculation are introduced.
介绍了大直径人工挖孔桩的优点以及竖向承载力计算。
This paper discusses the importance of examine large diameter pile hole, analyzes current examining methods and problem of large diameter pile hole and puts forward methods to solve the problem.
阐述了大口径检测的重要意义，分析了目前大口径质量检测的方法和存在的问题，并指出了解决这些问题的方法和途径。
High pressure ring-shaped DTH drills are key equipment for underground high level large diameter long hole mining.
高气压环形潜孔钻机是地下矿山高阶段大直径深孔采矿的关键设备。
The results show that the blast hole diameter has little effect of the vibration level in production blasting, and the other factors should be considered in large scale delay blast design.
结果表明，除炮孔孔径在实际生产爆破中对振动影响不明显外，其它因素在大区微差爆破的设计中都值得注意。
The method Posseses an advantage to prevent large diameter threaded hole pestled.
提出了防止大螺孔研坏的方法。
The entering-rock problem of pouring pile through large-diameter hole drilling is always the biggest difficult problem in the fundamental construction of Guangxi.
大口径钻孔灌注桩的入岩问题，历来是广西基础施工中的一大难题。
These structural parameters produce to the different impact of the oil-water separation, the relatively large effect is the diameter of liquid distributor and the hole shape in the all parameters.
经过分析可知，这些结构参数不同程度的影响了油水分离效果，其中对油水分离效果影响比较明显的是配液管的管径和对配液孔形状的选取。
Reduction of the focus hole diameter strongly affects the electrons with large emission angle but its influence on electron focusing is less markedly than the influence of the variations in potential.
减小聚焦极孔径对大发散角的电子有影响，但对聚焦作用的影响不如改变电位明显。
Sometimes, the work over operation must be done to large diameter cased bore hole for the need of production of the well.
因生产需要，有时要对大套管井筒进行修井。
Sometimes, the work over operation must be done to large diameter cased bore hole for the need of production of the well.
因生产需要，有时要对大套管井筒进行修井。
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