• A one-way valve is installed on the oil outlet pipe, and the utility model has the advantages of simple structure, rapid discharge and suction, convenient operation and low cost.

    出油管路上装有一个单向阀。本优点结构简单、使用方便、成本

    youdao

  • A one-way valve is installed on the oil outlet pipe, and the utility model has the advantages of simple structure, rapid discharge and suction, convenient operation and low cost.

    出油管路上装有一个单向阀。本优点结构简单、使用方便、成本

    youdao

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