perforation
短語詞組
- stercoral perforation 結(jié)腸糞性穿孔;糞性結(jié)腸穿孔
- abraded perforation 磨蝕的射孔眼
- Mixed Perforation 混合齒孔
- Perforation Misplaced 齒孔移位
- Bald perforation 禿齒
- blocked perforation 堵塞的炮眼
- Short perforation 短齒
- undamaged perforation 無污染射孔
- gun perforation 射孔;射孔完井
- perforation plate 穿孔板；勻漿板 返回 perforation