单项选择题
A.21m3,480 B.22m3,650 C.23m3,660 D.24m3,860
A.热熔油,12,3 B.蒸汽洗,12,3 C.蒸汽洗,6,2 D.热熔油,6,2
A.21m3,420 B.20m3,450 C.22m3,560 D.21m3,450