異い形けい丸まる鋼こう

noun

deformed bar; deformed round bar

Technical term in construction and civil engineering for a round steel bar with surface deformations to improve bonding with concrete.

• 鉄てっ筋きんコンクリートには異い形けい丸まる鋼こうがよく使つかわれる。

  Deformed round bars are often used in reinforced concrete.