main gear reduction ratio的意思|示意

The V belt wheels of noise experimental table of main carriage reduction gear must suit drive ratio, be lightest in weight and least in moment of inertia .

为降低轿车主减速器噪声测试试验台本底噪声，其传动系统采用了四对三角胶带传动。

Multi-purpose mini-motorcycle in the belt drive gear for the latter, the main, the size of the driven pulley reduction ratio sub-decision.

在微型摩托车多用皮带传动方式作后传动装置，主、从动皮带轮的大小决定次级减速比。