 |
| |||
| 仲多聚甲醛 | |||
| 仲甲醛; 多聚甲醛 ((CH2O)x) | |||
| 低聚甲醛 | |||
| 多聚甲醛; 别三聚甲醛 (消毒防腐药) | |||
| |||
| 多聚甲醛土壤杀菌剂 | |||
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paraformaldehyde : 3 phrases in 3 subjects |
| Nursing | 1 |
| Oil / petroleum | 1 |
| Polymers | 1 |
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