4. Measuring and testing
  5. Volume or rate of flow
  6. Using differential pressure

Alfred Theodor Dyck

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Airflow sensor

Measuring and testing – Volume or rate of flow – Using differential pressure
Reexamination Certificate

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Airflow sensor

Measuring and testing – Volume or rate of flow – Using differential pressure
Reexamination Certificate

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Fan powered silencing terminal unit

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate

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Single duct silencing terminal unit

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate

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