Word: breakproof
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...Breakproof Glass. A new line of glassware that is virtually breakproof-and if it does break, leaves no jagged edges-was put on sale by St.-Gobain of Paris at Gimbel Bros. The glass can be transferred from a subzero freezer to a 600° F. oven without cracking. Price of a twelve-piece tumbler...
Tough Alloy. "Elgiloy," a tough, cobalt-base alloy developed by Elgin National Watch Co. and Battelle Memorial Institute for rustproof and breakproof watch springs, is now on the market. Possible uses: fountain-pen nibs, valves, dental equipment, aircraft instruments and bearings...
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