To change the linkage of an interactive object, double-click the thumbnail of the slide, and click the object.
要改变一个交互式对象的链接，双击幻灯片的缩略图，然后单击对象。
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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