Equipped with manual oil pumping unit.
配有手动上油装置。
The present invention belongs to petroleum mechanical field, especially energy saving oil pumping machine.
本发明创造属于石油机械，尤其是节能抽油机。
The present invention belongs to petroleum mechanical field, especially energy saving oil pumping machine.
本发明创造属于石油机械，尤其是节能抽油机。
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