锚链孔防水塞 jackass ; hawse block
发热性缩孔防止粉 exothermic antipiping powder
钻孔防腐法 bore hole method
针孔防止剂 anti-pitting
防盗锁孔 Kensington ; Kensington Lock Hole
局部开孔防波堤 partially perforated breakwater
防缩孔粉剂 pipe eliminator
防窃锁孔 Kensington
防爆视孔灯 CBKD ; Explosion proof emergency ligh
防缩孔剂 Anti-cratering Agent ; RF-SO
本实用新型是家用压力锅排汽孔防堵塞装置。
The utility model relates to an obstruction-proof device for exhaust holes of domestic pressure cookers.
它采用高孔密大孔径深穿透射孔弹和大压差抽吸炮眼清洗技术，不仅能提高油井产能，解除近井带污染，还可以改善防砂完井效果。
The technology uses deep penetration perforation charge with high perforation density and large perforation diameter and surging perforation with greater pressure differential.
结果表明，冷扩张过程所引入的切向残余压应力能保持足够的强度，以对钢轨螺栓孔起到显著的防裂和止裂作用。
It is concluded that, the residual stress induced by cold expansion can maintain enough strength to prevent and retard fatigue crack initiation and growth in rail bolt hole.
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