Pre-cast concrete unit for manholes

Details Pre-cast concrete unit for manholes Pre-cast concrete unit for manholes

1976-08-09

1978-02-14

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Underground service vault

D2502

Patent

active

D02472546

REFERENCES:
patent: D30695 (1899-05-01), Greger
patent: D30697 (1899-05-01), Greger
patent: 315836 (1885-04-01), Raynald
patent: 2346361 (1944-04-01), Cupido

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