DIFF Subgroup
B07B 1/15 using corrugated, grooved or ribbed rollers
Introduced: July 1974
Full Title
Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like > Apparatus having only parallel elements > Roller screens > using corrugated, grooved or ribbed rollers
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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