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PCE
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DIFF Subgroup
F21V 11/12

of slot type

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Screens not covered by groups , , or > using diaphragms containing one or more apertures > of slot type

CPC:

Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 (characterised by cooling arrangements F21V29/502) > using diaphragms containing one or more apertures > of slot type

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