單項(xiàng)選擇題鋼筋彎曲機(jī)軸芯金、成型軸的規(guī)格應(yīng)當(dāng)和加工鋼筋的直徑彎曲半徑適應(yīng),其心軸直徑為鋼筋直徑的()倍

A.2
B.2.5
C.3


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