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GB/T 31931-2015  China national standard english version:

　
GB
中华人民共和国国家标准
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

GB/T 31931-2015

Zinc or zinc alloy coating on steel sheets or strips—Determination of hexavalent chromium content—1,5-Diphenylcarbohydrazide (diphenylcarbazide) spectrophotometric method
钢板及钢带 锌及锌合金镀层中六价铬含量的测定 二苯碳酰二肼分光光度法
Issued Date:2015-09-11 　 Implemented Date:2016-06-01
Issued by: 　 The Standardization Administration of the People's Republic of China
　

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GB Standard Code GB/T 31931-2015
Standard Category China National Standards
GB Standard English Title Zinc or zinc alloy coating on steel sheets or strips—Determination of hexavalent chromium content—1,5-Diphenylcarbohydrazide (diphenylcarbazide) spectrophotometric method
GB Standard Chinese Title 钢板及钢带 锌及锌合金镀层中六价铬含量的测定 二苯碳酰二肼分光光度法
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