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PCE
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DIFF Subgroup Additional Only
Y10T 428/249971

Preformed hollow element-containing

Full Title

Stock material or miscellaneous articles > Web or sheet containing structurally defined element or component > Composite having voids in a component [e.g., porous, cellular, etc.] > Preformed hollow element-containing

Of 3 combined children, 0 exist in both systems.

3 codes are CPC-only extensions.

Note: 3 CPC extensions are marked as secondary classification only.