A.立式金屬罐 B.臥式金屬罐 C.罐車 D.球罐
A.1,5,10,15,20 B.10,50,60,80,100,200 C.5,10,15,20,30,50 D.20,30,40,50,60
A.2 B.3 C.5 D.7