CPC Subgroup
C22B 34/30 Obtaining chromium, molybdenum or tungsten
Full Title
Obtaining refractory metals > Obtaining chromium, molybdenum or tungsten
3 direct subcodes
Child Classifications
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- C22B 34/32 Obtaining chromium
- C22B 34/34 Obtaining molybdenum
- C22B 34/36 Obtaining tungsten