マルエー

(A) マルエーと呼びます。マル記号がないため()でくくります。

焼鈍し(やきなまし)
鋼の熱処理の一種であり、金属部材を加熱して適当な時間保った後、ゆっくり冷却する操作。鋼を軟化させて機械加工や塑性加工を容易にさせることにあります。

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