A.氣壓大,氣刀距帶鋼較遠(yuǎn)B.氣壓小,氣刀距帶鋼較遠(yuǎn)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(jìn)B.禁止C.抑制