bottom hole pattern 井底形状
drilling hole pattern 炮孔布置图
blast hole pattern 炮孔布置图
square hole pattern 方孔布置
four-bolt hole pattern 四螺栓孔结构
bolt hole pattern 螺栓孔式样
The bottom hole pattern of a well is the aggregation of the pits on the bottom rock cut by the bit teeth in the course of drilling.
井底模式就是钻头在钻凿岩石的过程中，钻头牙齿在井底岩石上打出凹坑的集合。
Using full vector orthogonal function model of the auxiliary air hole pattern of cut-off characteristics of optical fiber were discussed.
利用全矢量正交函数模型对空气孔辅助光纤的模式截止特性进行了讨论。
The reasonable hole pattern of deephole blasting was utilized to make fully use of the explosive energy to improve the crushed ratio to lower the boulder yield and to obtain better dam rocks.
深孔爆破采用合理的布孔方式，使炸药爆炸能量得以充分发挥，破碎率提高，大块度降低，从而获得较理想的堆石坝石料。
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