研けん磨ま面めん

noun

polished surface; ground surface

Technical term for a surface that has been polished or ground, used in engineering, manufacturing, and materials science.

• 研けん磨ま面めんの粗あらさを測そく定ていする。

  Measure the roughness of the polished surface.

• この部ぶ品ひんの研けん磨ま面めんは鏡かがみのように滑すべらかだ。

  The ground surface of this part is as smooth as a mirror.