短語詞組短語wide slot traction wheel 寬槽牽引輪steel traction wheel s 敺動(dòng)鋼輪double slot traction wheel 雙槽牽引輪traction force at wheel rim 輪周牽引力traction wheel rope -groove 曳引輪繩槽wheel traction motor 車輪牽引馬達(dá)traction motor suspended on wheel -set 軸懸 返回 traction wheel