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Nbr Rubber High Rib Roofing Sheet

Photo vulcanized rubber is heated in a giant sealed cooker like this one, used for making earthmover tires, pictured at firestone tire company in 1942.At that time, it was the biggest rubber vulcanizer in the world, standing some 2.5 stories high when opened wide.Ive colored the people in the pictures red to give you an idea of the scale.