Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 672
stem and burners. B serves as a temporary gas storage, pressure regula-tor and motive power for automatic opening and closing of feed valve 8. After opening vent valve 30, the residue is removed by opening gate 12; turninghandle 13 rotates scraper blade 14 and dislodges all residue from the…
Building materials
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