Change the oil in the rotary gear box (transmission).

更换转盘变速箱机油。

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Roller check box care of the oil situation in a timely manner with oil.

检查托滚盒的油面情况及时加上油。

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Roller check box care of the oil situation in a timely manner with oil.

检查托滚盒的油面情况及时加上油。

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