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常关阀
| 门
| 常关阀 | |
| tech. | normal close valve |
| 门 | |
| gen. | door; threshold; portal |
| desert. | phylum; realm |
| geophys. | gate |
| life.sc. | hilum |
| met. | closing device |
| space | gateway |
| |||
| normal close valve | |||
|
常关阀 : 1 phrase in 1 subject |
| Space | 1 |
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