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The Construction of Chimneys, Columns, pilasters and reinforced concrete poles and their Molds and Accessories and Construction applicable to factories, Mines, Transportation, Telegraphs, telephones,Closures of electricity and Electric Fields.
The Construction of Chimneys, Columns, pilasters and reinforced concrete poles and their Molds and Accessories and Construction applicable to factories, Mines, Transportation, Telegraphs, telephones,Closures of electricity and Electric Fields.