| Signature mark | FA 004/2220 |
|---|---|
| Subject | Gutachten (1) |
| Title | Gutachten von Heinrich Ludewig für das Staatsministerium des Innern über ein Patentgesuch des Maschinenfabrikanten Wilhelm Knaust aus Wien über ein Absperrventil |
| Duration | 1875 |
| Scope | 1 Bl. hs. |
| Subject area | Maschinenelemente. Absperrelemente. Ventile <510.07.03> |
| Rights notice | CC BY-SA 4.0 |
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