perforation
短语词组
- stercoral perforation 结肠粪性穿孔;粪性结肠穿孔
- abraded perforation 磨蚀的射孔眼
- Mixed Perforation 混合齿孔
- Perforation Misplaced 齿孔移位
- Bald perforation 秃齿
- blocked perforation 堵塞的炮眼
- Short perforation 短齿
- undamaged perforation 无污染射孔
- gun perforation 射孔;射孔完井
- perforation plate 穿孔板；匀浆板 返回 perforation