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GB/T 2891-1995 English PDF (GBT2891-1995)

GB/T 2891-1995 English PDF (GBT2891-1995)

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GB/T 2891-1995: Performance test methods for facepiece of filfer type respirator
This Standard specifies the air leakage coefficient for the wearing, actual dead space, field of view, assembly air tightness, exhalation valve air tightness, exhalation valve resistance to air, lens transmittance (transmittance ratio) and facepiece inhalation resistance and other performance test methods for filter type respirators.

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