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天然氧化铝
| 磨料
| 天然氧化铝 | |
| tech. | natural alumina |
| 磨料 | |
| chem. | grinding material |
| CNC | polish |
| met. | abradant; abraser; abrasive; abrasive grit; abrasive material; abrasive media |
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| natural alumina | |||
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天然氧化铝 : 1 phrase in 1 subject |
| Engineering geology | 1 |
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