穿孔

1. Origins, structure, and basic meaning

• Structure: 穿孔 is read as せんこう and is a technical term combining 穿 (pierce) and 孔 (hole), naming both a perforating operation and the hole produced.
• Basic usage: Use 金属板に穿孔する for the operation and 小さな穿孔が見つかる for a resulting hole.

2. Common pitfalls and similar expressions

• Everyday phrase and technical term
  • Everyday speech favors 穴を開ける; manufacturing and inspection use 穿孔 as a process or defect term.
• Operation and defect
  • It can be an intentional series of holes or an unwanted perforation discovered in a pipe.