本表内没有显示的其它材料和阀内件的可提供性，请联系美国太平洋阀门公司。

For availability of other materials and trims not shown in this chart, contact Pacific Valves.

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这种指明了可提供性的选定的业务规则就可以同用例流程中的某一步骤联系起来，并为软件工程师在设计房间可提供性时提供了一个精确的答案。

The chosen business rules indicating availability can now be associated with a step in the use-case flow and will give software engineers a precise answer to determine room availability.

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良好的安全性可提供深度防御；使用多种方法并不一定是坏事。

Good security provides defense in depth; using more than one approach is not necessarily a bad thing.

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