几种能源监测流量仪表的比较： 1、节流装置：基于节流产生差压，测差压的平方根可知流量大小。长期以来这类仪表由于可承受恶劣的工况，且已有国际标准作依据，曾占据了流量仪表的60~70%市场，类型多达二、三十种。 ①经典式：已建立国际、国
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