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71. | maximum safe altitude |
| 最大安全高度 |
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72. | actual safe load |
| 实际安全荷载 |
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73. | minimum safe distance |
| 最小安全距离 |
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74. | fire-safe furniture |
| 防火安全家具 |
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75. | safe-flying speed |
| 安全飞行速率 |
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76. | limiting safe mixture |
| 极限安全混合物 |
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77. | safe for swimming |
| 对游泳安全 |
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78. | fail-safe equipment |
| 破损安全装置 |
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79. | safe operating area |
| 安全运转区域 |
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80. | ultra-safe explosive |
| 超级安全炸药 |
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