在清水墙时，必须将立缝排匀。

Set up vertical joints evenly in the dry wall.

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在剖析老式纸袋包装机的基础上，试制了卧装立缝半自动纸袋包装机。

A novel horizontal installed and vertical sewing semiautomatic paper bag packaging machine was manufactured.

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该设备配以柔性轨道、刚性直轨道，分别焊接了储罐的弧形拱顶和立缝，取得了满意的效果。

This machine combining respectively with flexible trackway and rigid straight trackway is used to weld the dome and vertical wall of a storage tank, and the result is satisfactory.

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