平へい炉ろ法ほう

noun

open-hearth process

Technical term in steelmaking; refers to the open-hearth furnace method for producing steel.

• 平へい炉ろ法ほうはかつて鉄てっ鋼こう生せい産さんの主しゅ流りゅうだった。

  The open-hearth process was once the mainstream method of steel production.