孔洞 meaning in English

opening or hole in a utensil, etc.
◇孔洞石英 mouse-eaten quartz

High-strength bolts were inserted into the holes and tightened to a high preload level .
把高强度螺栓插入孔洞，同时拧紧螺栓达到高的预加载水平。
Stress distribution near cavity on grain boundary
多晶体材料晶界孔洞应力场分析
Mine plans - drilling and cavern - part 1 : drilling
矿区平面图.钻探和孔洞.第1部分:钻探
A tapered steel pin for enlarging and aligning holes
打孔器用来扩大或调整孔洞的尖钢针
Holes problem influencing on fracture characteristic of 3d braided cmc
断裂性能的孔洞问题

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