DIFF Subgroup
F27B 1/02 with two or more shafts or chambers, e.g. multi-storey
Introduced: September 1968
Full Title
Shaft or like vertical or substantially vertical furnaces > with two or more shafts or chambers, e.g. multi-storey
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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