這根牛皮帶頂角劃痕

1.發動(dong)(dong)機(ji)傳動(dong)(dong)帶對發動(dong)(dong)機(ji)傳動(dong)(dong)帶輪不(bu)是

1.運(yun)用精(jing)確的(de)牛皮帶(dai)輪(lun)與牛皮帶(dai)輪(lun)輪(lun)組合名(ming)字(zi)

（分別于(yu)輸送帶(dai)輪之輸送帶(dai)過(guo)小）