characterised by the material

Introduced: July 1974

Full Title

Diaphragms; Spacing elements > characterised by the material

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1974.

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C25B 13/05 based on inorganic materials since 2021 IPC+CPC Available in IPC and CPC
C25B 13/08 based on organic materials since 1974 IPC+CPC Available in IPC and CPC