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| 黑〔硬,天然〕沥青 | |||
| 硬黑沥青 (地沥青石的一种) | |||
| 天然沥青 | |||
| 硬沥青 | |||
| 天然硬沥青 | |||
| 矿物橡胶; 硬质沥青; 黑沥青; 硬沥肯 | |||
| 沥青色 | |||
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| 商品名硬沥青水泥添加剂 | |||
| gilsonite: 4 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 3 |
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