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papier filtre : 25 phrases in 11 subjects |
Chemistry | 12 |
Environment | 1 |
Finances | 1 |
Forestry | 2 |
General | 1 |
Industry | 2 |
Laboratory equipment | 1 |
Medical appliances | 1 |
Patents | 1 |
Pulp and paper industry | 2 |
Textile industry | 1 |