A.5~10minB.12~15minC.16~20minD.20~25min
A.1100~1200r/minB.1200~1300r/minC.1300~1400r/minD.1400~1500r/min
A.1.0~1.2倍B.1.2~1.5倍C.1.5~1.8倍D.1.8~2.0倍