A.7.5;7.5 B.5;5 C.5;7.5 D.7.5;5
A.0.5米;1倍 B.0.5米;2倍 C.0.6米;1倍 D.0.6米;2倍
A.37.5度~172.5度 B.112.5度~172.5度 C.337.5度~112.5度 D.217.5度~352.5度