The main points and difficult points in the drilling machining of balance tube for screw panel in the drilling and the method of solving these problems are introduced in this article.

超临界锅炉水冷壁螺旋管屏的平衡管管孔加工难点和要点，以及解决的工艺措施。

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Remove the screw located above the front door speaker grille on the front door trim panel.

拆卸位于拆卸前门饰板上前门扬声器风栅上方的螺钉。

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Install the screw in the trim panel depression.

安装饰板压低处的螺钉。

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