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| 松沙 (土) | |||
| 散沙 | |||
| 松散砂 | |||
| 松散土壤 | |||
| 散砂; 松砂 | |||
| 落砂后保留在铸件上型砂 | |||
| 不胶结砂岩; 疏松砂岩 | |||
| 松散砂 | |||
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loose sand : 4 phrases in 1 subject |
| Technology | 4 |
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