所述中间导轨放置在所述两块竖直放置的板中间，两块板上的四个支撑轴分别放入所述中间导轨的四个卡槽中。

The intermediate guide rail is set between these two perpendicular boards, the four support shafts on these two boards are set separately inside the four slots.

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该导轨组件包括外部拉出槽(50)、中部拉出槽(30)和用于容许拉出槽的相对运动的滚柱装置(15、25)。

The guide rail assembly includes an outer pull out channel (50), intermediate pull out channel (30) and roller units (15, 25) for allowing the relative movement of the pull out channels.

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