A.2~9t B.2~13t C.5~9t D.5~13t
A.≤15Km/h B.≤18Km/h C.≤20Km/h D.≤24Km/h
A.58.5mm±1.0mm B.68.5mm±1.0mm C.71mm±1.0mm D.76mm±1.0mm