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| 71. | fail safe operation |
| 安全运行 |
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| 72. | act of technique for security |
| 安全技术规程 |
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| 73. | engineering safety |
| 工程安全 |
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| 74. | Security Post |
| 安全投递 |
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| 75. | ecological security |
| 生态安全 |
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| 76. | emergency air inlet |
| 安全气孔 |
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| 77. | exhaustive methylation |
| 安全甲基化 |
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| 78. | Department of Safeguards |
| 安全保障部 |
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| 79. | environmental safety |
| 环境安全 |
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| 80. | safe and electricity-saving |
| 安全省电 |
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