A.1/2 B.1 C.1.6~1.7 D.2
A.掃、排氣存在氣閥重疊角 B.彎流掃氣的缸套下部受熱不均勻 C.直流掃氣的換氣質(zhì)量最好 D.換氣質(zhì)量取決于掃氣壓力的高低
A.130°~150° B.100°~120° C.150°~180° D.110°~130°