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The characteristics of formaldehyde sorption depend greatly on humidity
BS EN 62129-2 describes the calibration of wavelength meters to be performed by calibration laboratories or by wavelength meter manufacturers
for each level
— coherence between their activities
Determine essential environmental parts of environmental standards
Eye and face protection. Sunglasses and related eyewear - Filters for direct observation of the sun Ingestion-build-63114 The characteristics of formaldehyde sorption1 Scope This part of ISO 12312 applies to all afocal (plano power) products intended for direct observation of the sun, such as solar eclipse viewing. Information on the use of filters for direct observation of the sun is given in Annex A and Annex B. This part of ISO 12312 does not apply to the following: a) afocal (plano power) sunglasses and clip ons for general use intended for protection against solar radiation; b) eyewear for protection against
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