Main production of copper rod, brass, copper and various copper alloy products sets, located in the western suburbs of Shanghai Economic Development Zone - liantang Qingpu Industrial Zone.
主营生产铜棒、铜管、铜套及各种铜合金制品，座落在上海市西郊经济开发区-青浦练塘工业园区。
It features in the engaging of the gear sleeve that matches with the rotary of the master shaft and the connecting rod rack of two sets pistons.
其特征是一个与主轴转动配合的齿轮套与两套活塞组的连杆齿条相啮合。
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