Motor cycles with or without a sidecar, invalid carriages and threewhelled motor vehicles with an unladen weight no exceeding 400 kg (900 lbs.是什么意思_Motor cycles with or without a sidecar, invalid carriages and threewhelled motor vehicles with an unladen weight no exceeding 400 kg (900 lbs.在线翻译_英语_读音_用法_例句