FI-SubClass-Choice
「SubClass」 in C22 can be selected for this page.
Select the desired 「SubClass」.
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C22B
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PRODUCTION OR REFINING OF METALS (making metallic powder or suspensions thereof B22F 9/00; production of metals by electrolysis or electrophoresis C25); PRETREATMENT OF RAW MATERIALS
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C22C
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ALLOYS (treatment of alloys C21D, C22F)
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C22F
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CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS (processes specific to heat treatment of ferrous alloys or steels and devices for heat treatment of metals or alloys C21D)
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