安全阀的压力值在出厂时已经调定，使用中不要随意调节。
The pressure of safety value has been settled up well in factory, don t adjust it freely.
安全阀的压力值在出厂时已经调定，不要随意调节。
The pressure of safety value has been settled up well in factory, don t adjust it freely.
安全阀的压力值在出厂时已经调定，不要随意调节。
The pressure of safety value has been settled up well in factory, don t adjust it freely.
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