... drags 阻力锚 hazardous operation 危险作业 collapse 毁坏 ...
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... hazardous rock 杂乱的岩石 hazardous operation 危险性作业 hazardous chemicals 危险化学药,危险的化...
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Hazardous operation robot 危险作业机器人
Hazardous chemical operation 危险化学品操作
·2,447,543篇论文数据，部分数据来源于NoteExpress
Emergency crews have removed a "potentially hazardous" chemical drum washed up on a Jersey beach, in an operation taking about two-and-a-half hours.
BBC: 'Hazardous' chemical drum found on Jersey beach
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