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GBZ/T 229.4-2012 English PDF (GBZT229.4-2012)

GBZ/T 229.4-2012 English PDF (GBZT229.4-2012)

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GBZ/T 229.4-2012: Classification of occupational hazards at workplaces -- Part 4: Occupational exposure to noise
This Part of GBZ/T 229 stipulates the classification principles and classification methods of works (jobs) exposed to industrial noise at workplaces. This Part applies to the classification management of all kinds of works (jobs) exposed to industrial noise.

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