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| 霜冻线; 霜结线 | |||
| 冰冻线土中 (in soil); 冻结线 | |||
| 冻土深度线 (土壤冬季冻结深度) | |||
| 霜冻线 | |||
| 冰冻线 | |||
| 冷却线 | |||
| 霜线; 冻深线; 地冻深度 | |||
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| 地下冰冻线 (in soil) | |||
| frost line: 4 phrases in 2 subjects |
| Metallurgy | 2 |
| Plastics | 2 |
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