DIFF Subgroup
B28C 1/003 Full Title
Apparatus or methods for obtaining or processing clay (filtration in general B01D; separation of solids from solids B03, B07; chemical part C04B; by mining or quarrying E21C41/16, E21C41/26, E21C47/10)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.