A.180 B.260 C.300 D.320
A.0.8 B.1.0 C.1.2 D.1.5
A.直徑20mm,墊片4mm厚 B.直徑22mm,墊片4mm厚 C.直徑25mm,墊片5mm厚 D.直徑20mm,墊片直徑19.5mm