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Normally closed valve

以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译

1
阀门有常开和常闭两种，可用于燃油，液压或气动应用领域。
Valve types include Normally Open and Normally Closed valves, for use in fuel, hydraulic, or pneumatic applications.
2
这些阀门可以常闭，常开或普遍。
These valves can be normally closed, normally open or universal.
3
任何结合在一起的常闭，常开或通用阀门可归纳。
Any combination of normally closed, normally open or universal valves may be grouped together.

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