perforation

短语词组

短語

• stercoral perforation 結腸糞性穿孔;糞性結腸穿孔
• abraded perforation 磨蝕的射孔眼
• Mixed Perforation 混郃齒孔
• Perforation Misplaced 齒孔移位
• Bald perforation 禿齒
• blocked perforation 堵塞的砲眼
• Short perforation 短齒
• undamaged perforation 無汙染射孔
• gun perforation 射孔;射孔完井
• perforation plate 穿孔板；勻漿板
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