American Vitrified Conduit Company : vitrified salt glazed underground and interior conduits, contractors for complete installation of conduit systems. . Multiple Duct Conduits with Concrete Base and Cover, Class B. Construction. 20 CONDUITS OF AMERICAN VITRIFIED CONDUIT Multiple Duct Conduits, with complete Concrete Envelope. Class C. Construction.

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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanvitr, bookyear1899