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（2）结构简单、体积小、重量轻。
因此，电动机漏抗的大小要兼顾到整个调速范围内阻抗匹配的合理性。
HQ-1151/3051/3851/3351DP系列数字差压变送器用于测量液体、气体或蒸汽的液位、密度和压力，然后将其转变成4～20mADC信号输出。
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电动调节阀工作原理：电动调节阀根据调节部位信号，自动控制阀门的开度，从而达到介质流量、压力和液位的调节。
负载影响：没有负载影响，除非电源电压有变化。
相反，若水温过低，茶叶中的有效物质又不能充分溶出，使茶汤香薄味淡，甚至造成茶浮于水面沉不下去，饮用不便。
因此，在氧气使用场所可以配置氧气报警器，实时对现场氧气浓度进行检测，保证人员**。
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具有0-10mA，4-20mA的标准模拟量信号输出和现场指示。
简单介绍：HQLDE热水流量计由传感器和转换器两部分构成。
磁致伸缩液位计价格工作原理磁致伸缩液位传感器的结构部分由不锈钢管（测杆）、磁致伸缩线（波导丝）、可移动浮子（内有长久磁铁）等部分组成，见图。
国债质押贷款可贷国债面额的90％。
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