Nrog rau kev txhim kho qib kev lag luam thiab kev tsim khoom, kev ntsuas ntws tau dhau los ua cov cuab yeej siv tsis tau hauv ntau qhov chaw.Ultrasonic flowmeter yog ib qho ntawm lawv, nws yog dav siv hauv tshuaj, hluav taws xob, dej thiab lwm yam lag luam.Daim ntawv no yuav qhia txog lub hauv paus ntsiab lus, charac...
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