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PCE
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CPC Subgroup
E04F 17/08

for receiving utility lines, e.g. cables, pipes (covers giving access to the ducts or channels, covers of inspection holes E04F19/08)

Full Title

Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D ) > for receiving utility lines, e.g. cables, pipes (covers giving access to the ducts or channels, covers of inspection holes E04F19/08)