该调节阀采用的膨胀节是非波形的，国内外没有可直接使用的设计方法。
No design method available for direct application at home and abroad for the non - waveshape expansion joint of this regulating valve.
该调节阀采用的膨胀节是非波形的，国内外没有可直接使用的设计方法。
No design method available for direct application at home and abroad for the non - waveshape expansion joint of this regulating valve.
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