超声波流量计的应用及原理（2003年大连索尼卡仪表公司服务部）一．引言首先家简单介绍一下流量计的概念凡是有物质流动的场合，人们为掌握其数量都需要流量测量。流量分为瞬时流量（Flow Rate）和累计流量（Total Flow）瞬时流量（Flow Rate）：单位时间内过封闭管道或明渠有效截面的量。流过的物质可以是气、液、固体。数学公式： &
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