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hazard classification
| system
| hazard classification | |
| tech. | 易燃等级; 公害等级; 火灾等级; 危险分类 |
| system | |
| gen. | 体 |
| IMF. | 安排 |
| met. | 系; 装置 |
| |||
| 易燃等级; 公害等级; 火灾等级; 危险分类 | |||
|
hazard classification system : 10 phrases in 3 subjects |
| Aviation | 1 |
| Technology | 8 |
| United Nations | 1 |
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