如果特别指定，这些阀门可以采用下列合金钢制造，适用于蒸汽、水、油、油气、煤气和通用应用。

When specified, the valves are available in the alloys shown below which are suitable for steam, water, oil, oil vapor, gas and general services.

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如果加长装置安装在与PVC或CPVC不同的其它材料阀门上，在订购时也必须特别指定。

And, if the extension is to be installed on a valve of material other than PVC or CPVC, that must also be specified when ordering.

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