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.
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.
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