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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 223.91-2021 |
Iron, steel and alloy—Determination of copper—2,2’-Biquinoline spectrophotometric method 钢铁及合金 铜含量的测定 2，2'-联喹啉分光光度法 |
China National Standards 2,2’ |
 English PDF |
| GB/T 37038-2018 |
DSD acid（4,4’-Diaminostilbene-2,2’diasulfonicacid） DSD酸(4，4′-二氨基二苯乙烯-2，2′-二磺酸) |
China National Standards 2,2’ |
English PDF |
| GB/T 30910-2014 |
Rubber shoes—Determination of migration of 2-Mercaptobenzothiazole and 2,2’-Dithiobis(benzothiazole) 胶鞋 2-巯基苯并噻唑、二硫化二苯并噻唑迁移量的测定 |
China National Standards 2,2’ |
English PDF |
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