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GBZ 49-2014 English PDF (GBZ49-2014)

GBZ 49-2014 English PDF (GBZ49-2014)

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GBZ 49-2014: Diagnosis of occupational noise-induced deafness
This Standard specifies the diagnostic principles, diagnostic grading and treatment principles of occupational noise-induced deafness. This Standard applies to the diagnosis and treatment of hearing loss caused by long term occupational exposure to noise.

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