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PCE
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DIFF Subgroup
G09B 17/02

Line indicators or other guides or masks

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Teaching reading > Line indicators or other guides or masks

CPC:

Teaching reading (teaching lip-reading G09B21/00) > Line indicators or other guides or masks

No child classifications to compare. This is a leaf node in both IPC and CPC.