 |
| |||
| 回〔旧，单一，统一〕砂 | |||
| 单一型砂 | |||
| 再生砂; 单一砂 | |||
| system sand: 22 phrases in 10 subjects |
| Agriculture | 1 |
| Desert science | 4 |
| Earth sciences | 1 |
| Ecology | 1 |
| Environment | 1 |
| Mining | 2 |
| Oil / petroleum | 3 |
| Pulp and paper industry | 1 |
| Rail transport | 1 |
| Technology | 7 |
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