只需增加底座和阀盖之间的凸缘，就可以简单的调节到您理想的高度。
Simply build your enclosure to the desired height by adding standard size expansion collars between the base and the cover.
凸缘埋头垫圈和支撑垫圈的整体高度比后备垫圈高，所以埋头部分要深些。
Flange cup Washers generally have a greater overall height than Back up Washers and therefore the cup portion is deeper.
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