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Furniture. Operating mechanisms for seating and sofa-beds. Test methods included-in-kit BS EN 13121 Part 3

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BS EN 13121 Part 3 covers those tanks with a working pressure up to 10 bar for above ground use only

Departures from established methods and procedures

They feature both internal

it describes a simplified method for simulated in situ measurements of hearing aids and a description for determination of the directivity index (DI) of directional microphones in hearing aids in the horizontal plane

Furniture. Operating mechanisms for seating and sofa-beds. Test methods included-in-kit BS EN 13121 Part 3

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