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ISBN 0 580 39849 8
BS EN 13544-3 layouts a test method to check the oxygen concentration in the air/oxygen mixture generated by the air entrainment device
including the classification of aspirating systems
What is BS 4591- Distillation characteristics of organic liquids about
Watch cases and accessories. Tests of the resistance to wear, scratching and impacts Ingestion-build-134498 ISBN 0 580 39849 81 Scope This International Standard specifies tests for the evaluation of the resistance of watch cases and their wristlets to wear, scratching and impacts occurring when wearing the watch. This International Standard is applicable mainly to complete watch cases fitted with wristlets. However, certain tests can be applied to the watch case only, to the complete or partial wristlet, or to specially prepared samples. NOTE In order to simulate the state
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