| B | Sektion B — Arbeitsverfahren; Transportieren | SECTION B — PERFORMING OPERATIONS; TRANSPORTING | |||||
 | B22 | Gießerei; Pulvermetallurgie | CASTING; POWDER METALLURGY | ||||
| B22C | Gießformen (Formen von hitzebeständigem Material allgemein B28B) | FOUNDRY MOULDING (moulding refractory materials in general B28B) | ||||
 | B22C 7/00 | Modelle; deren Herstellung, soweit sie nicht in anderen Klassen vorgesehen ist | Patterns; Manufacture thereof so far as not provided for in other classes | ||||
| B22C 7/04 |
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| B22C 7/05 |
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