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| 41. | enclosed environment |
| 封闭环境 |
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| 42. | closed economy model |
| 封闭经济模式 |
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| 43. | closed in spaces |
| 封闭舱室 |
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| 44. | suppressor pulse |
| 封闭脉冲 |
|
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| | |
| 45. | closing membrane |
| 封闭膜 |
|
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| 46. | shield arc welding |
| 封闭电弧焊 |
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| 47. | sandstone seals |
| 砂岩封闭 |
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| 48. | enclosed lamp sign |
| 封闭灯号 |
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| 49. | shutting-off water |
| 封闭水层 |
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| 50. | dead front type |
| 封闭型 |
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