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| 81. | shutting-off water |
| 封闭水层 |
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| 82. | blockade needle |
| 封闭针 |
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| 83. | closed container |
| 封闭容器 |
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| 84. | enclosed environment |
| 封闭环境 |
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| 85. | closed economy model |
| 封闭经济模式 |
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| 86. | sandstone seals |
| 砂岩封闭 |
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| 87. | closed in spaces |
| 封闭舱室 |
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| 88. | shield arc welding |
| 封闭电弧焊 |
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| 89. | closing membrane |
| 封闭膜 |
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| 90. | enclosed lamp sign |
| 封闭灯号 |
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