Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 556
of as well. Tiie joint being between the steam chamber andthe spring chamber prevents the steam from coming in contact with the spring, thusinsuring it against damage by steam. While the packed Valve causes more or less annoyance and expense when usedin connection with the ordinary steam job, it is…
Building materials
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