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| hardening off | |||
| vulcanization A chemical reaction of sulfur (or other vulcanizing agent) with rubber or plastic to cause cross-linking of the polymer chains; it increases strength and resiliency of the polymer (المطاط او البلاستيك) | |||
| hornification | |||
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تقسية : 11 phrases in 5 subjects |
| Agriculture | 3 |
| Isolation | 4 |
| Medical | 1 |
| Thermal Energy | 2 |
| Wood processing | 1 |
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