A.氣壓大,氣刀距帶鋼較遠B.氣壓小,氣刀距帶鋼較遠C.氣壓大,氣刀距帶鋼較近D.氣壓小,氣刀距帶鋼較近
A.750~1550mmB.700~1000mmC.700~1500mmD.700~1550mm
A.促進B.禁止C.抑制