Word: pbs
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Last week Air Forces engineers were glad to announce that they had a new emergency runway material with the essential advantages of steel mats. Known officially as PBS (Prefabricated Bituminous Surface), it consists of a layer of cloth between two layers of tar-soaked paper. It can be carried in one-tenth the airplane space and laid, by machine, almost twice as fast. Spread over a rolled earth surface, the durable, water-repellent covering sustains the heat and shock of landings with little damage, bogs down only when subsurface moisture is extreme...