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aqua fortis; nitric acid | |||
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etching (Print made from a plate into which the design has been cut by acid. The process of producing such a plate) | |||
etching | |||
nitric acid (aqua fortis); aqua fortis | |||
acid | |||
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etchings |
eau forte : 12 phrases in 6 subjects |
Chemistry | 4 |
Communications | 2 |
General | 2 |
Labor law | 2 |
Metallurgy | 1 |
Municipal planning | 1 |