H. W. Johns Manufacturing Co. · H. W. Johns Mfg Co. · leaf 18
H. VV. JOHNS MANUFACTURING CO. 17 FROST PROTECTIVE COVERING. (patented.) … For Gas or Water Pipes. This Covering is made in sections three feet long, and is composed of alternate layers of corrugated and plain soft wool felting. It forms the neatest, most efficient and economical covering for the prevention of freezing in gas and water pipes, that has ever been…
Asbestos · Insulation · Paint · Roofing
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