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| old oil; scavenging oil | |||
| waste oil | |||
| used oil | |||
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用过的 油 : 10 phrases in 6 subjects |
| Animal husbandry | 1 |
| Automobiles | 4 |
| Cosmetics and cosmetology | 1 |
| Earth sciences | 1 |
| Oil processing plants | 1 |
| Technology | 2 |
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