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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 7778-2017 |
Number designation and safety classification of refrigerants + No.2 modification sheet 制冷剂编号方法和安全性分类+《第2号修改单》 |
China National Standards Number designation safety |
 English PDF |
| GB/T 7778-2008 |
Number designation and safety classification of refrigerants 制冷剂编号方法和安全性分类 |
China National Standards Number designation safety |
English PDF |
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