bellows differential-pressure indicator的意思|示意
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波纹管压差指示器
bellows differential-pressure indicator的网络常见释义
膜盒式差压指示计 膜盒控制导阀, 膜盒导引阀 bellows-operated pilot valve 膜盒式差压指示计 bellows differential-pressure indicator 膜盒型微压表 bellows type micro-manometer ..