As raw rubber is taken from the storehouse it is first thrown into softening vats and soaked in hot water for a period of several hours. When soft and more workable it is put on "cracking... A Wonder Book of Rubber - Pàgina 45 per B.F. Goodrich Company, Goodrich, B.F., Rubber Company, Akron, O. - 1917 - 72 pàgines Visualització completa -
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