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Testo 425 Thermal Anemometer 0560 4251 With 820mm Flow Probe For Ventilation/Air Conditioning Systems
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Amazon.com: Testo 416 Anemometer with Telescopic Probe – Handheld 0.63-inch Airflow Meter for Air Velocity and Volume Flow Calculation in Ventilation Ducts – CFM Meter HVAC 0.6 to 7874 fpm with App
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