Doppler ultrasonic flowmeter whakamahi i te ahupūngao o te pānga Doppler, i roto i tetahi rere wai i roto i te aroaro o te aukatinga ka whakaatahia te nekehanga auau tohu ultrasonic (ara, te rereketanga o te wahanga tohu), ma te ine i te rereketanga o te wahanga, ka taea te ine i te tere rere. .
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