GB/T 12085.20-2011 Standard PDF file download ; GB/T 12085.20-2011 Standard english preview version download

GB Standard Code	GB/T 12085.20-2011
Standard Category	China National Standards
GB Standard English Title	Optics and optical instruments - Environmental test methods - Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide
GB Standard Chinese Title	光学和光学仪器环境试验方法第20部分：含二氧化硫、硫化氢的湿空气
Chinese Version Price	$15 USD per 50 pages
English Translation Price	About $15 per 1 page; Inquire us for detail price

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