... compound powder of snake-bile and fritillary bulb 复方蛇胆川贝散 compound pulley 复滑车 compound pump 双缸泵 ...
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a compound pulley 复滑车
compound d pulley 复滑车
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The tower type belt driven long stroke pumping unit is composed of the crank-linkage-slide mechanism, movable pulley-narrow belt-fixed pulley mechanism and compound drum stroke-increment mechanism.
无游梁塔架式胶带传动长冲程抽油机由曲柄-连杆-滑块机构、动滑轮-窄胶带-定滑轮机构和复合滚筒增程机构组成。
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