内径

1. Origins, structure, and basic meaning

• Structure: 内径 is read ないけい. It means the inside or inner diameter of a pipe or circular part.
• Basic usage: It is measured with a special tool and compared with the value specified in a drawing.

2. Common pitfalls and similar expressions

• Measuring inner diameter
  • 管の内径を専用の器具で測った means measuring a pipe's inside diameter with a special tool.
• Matching a design value
  • 内径が設計図の数値と一致している means the actual inner diameter matches the value in the drawing.