多项选择题
A.电镀锌B.热镀锌C.化学镀锌D.机械镀锌
A.气压大,气刀距带钢较远B.气压小,气刀距带钢较远C.气压大,气刀距带钢较近D.气压小,气刀距带钢较近
A.750~1550mmB.700~1000mmC.700~1500mmD.700~1550mm