DIFF Subgroup
F22B 37/12 Forms of water tubes, e.g. of varying cross-section
Introduced: September 1968
Full Title
Component parts or details of steam boilers > applicable to more than one kind or type of steam boiler > Water tubes; Accessories therefor > Forms of water tubes, e.g. of varying cross-section
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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