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GB/T 12938-1991 standard english preview version PDF file download

GB Standard Code GB/T 12938-1991
Standard Category China National Standards
GB Standard English Title Determination of thiosulphate and other related residual chemicals in processed photographic materials--Iodine-amylose,methylene blue and silver sulphide densito-metric methods
GB Standard Chinese Title 已加工的摄影材料中硫代硫酸盐及其他相关化学残留物的测定方法 碘-直链淀粉法、亚甲蓝法和硫化银密度法
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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