on with the metal is said te Asbestos Air=Cell Fire Board. insure permanent and perfect lubrication, resuit- Strong claims are made for the efficiency of the ing in a reduction of the friction and wear of the asbestos air-cell fire board by the manufacturers, rods. The grains of this packing are… … made in the form of sectional covering or air-cell lagging for covering pipes. These coverings are FORMS OF ASBESTOS FIREBOARD. manufactured by the Asbestos Manufacturing thoroughly impregnated with the lubricating ele- Co., 291 Douglass street, Brooklyn, N. Y. ment, graphite. The metal is so…
Shipbuilding -- Periodicals · Shipbuilding industry -- Periodicals
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