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| olefin; alkene | |||
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| olefins | |||
| olefin resins | |||
| olefin resins (collective term for all types of PE and PP, nombre genérico para denominar a todos los tipos de polietileno y de polipropileno) | |||
| olefina: 16 phrases in 3 subjects |
| Chemistry | 8 |
| Environment | 1 |
| Textile industry | 7 |