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美国弗克斯波罗公司研制成一种新型821型系列电子式压力变送器,并在市场上出售。这种变送器在传感元件上采用一种正弦方式,从而也可进行频率传输。
Foxboro USA has developed a new 821 series of electronic pressure transmitters and is on the market. The transmitter uses a sinusoidal sensing element, which also allows frequency transmission.