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| 材料生命周期 (涉及材料的制造、分发、零售、使用、再利用和维护、回收和废物管理等所有阶段。) | |||
| material life cycle: 2 phrases in 2 subjects |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
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