阀门类型规定为球阀，但承包商可提出不同建议，由业主批准。
Valves have been specified as Ball valve type, however the Contractor may offer an alternative recommendation, subject to approval by Client.
每种阀门类型中列出的标准工作循环都可以升级成所示的更大的循环。
Standard duty cycles are listed for each valve type and are upgradeable to extended cycles as indicated.
个绍了液化石油气储罐第一道阀门的安装问题，并对安装的阀门类型进行了分析。
The procedure for fixing the first valve of LPG tanks is presented. Types for valve selection are analyzed.
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