多项选择题
A.固定顶 B.半固定顶 C.内浮顶 D.外浮顶
A.0.21% B.0.60% C.0.77% D.2.11%
A.1:200~1:400 B.1:200~1:500 C.1:300~1:500 D.1:200~1:700