A.源皮距 B.源片距 C.源限距 D.鉛擋塊高度 E.體表需擋的寬度
A.8CM*15CM B.7CM*15CM C.6CM*15CM D.5CM*15CM E.8CM*10CM
A.5CM*15CM B.4.5CM*15CM C.4CM*15CM D.5CM*10CM E.4CM*10CM