Based on the main structure of the erect sleeve washer, it installs a hollow column in the center of the inner tank.

它在竖直套桶式洗衣机主体结构基础上，内桶中心安装一空心立柱。

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Methods: ADFC was designed as hollow column, and the section is polygon. Disintegration and compressivestrength were carried out.

方法：ADFC设计成空心状柱体，截面为多边形，并进行了降解实验、抗压测试。

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It is indicated that the precise flat Plate, hollow column and clock gauge should be selected properly to satisfy actual requirements for measuring accuracy of oil well pump...

指出在实际生产中应根据需要选择合适精度的精密平板、空心立柱和千分表来装配，以满足抽油泵衬套测量精度要求。

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The rest of the vertical column is made from a material called syntactic foam - a solid made mostly of hollow "microballoons" - giving it enough buoyancy to float back up.

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