Word: silver
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Dates: during 1940-1949
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...bearings: silver is exceptionally slippery, durable and heat-resisting, is widely used in airplane engines...
Because of the great industrial demand, Congress three months ago authorized the Treasury to sell or lend war industry part of its silver hoard not needed for currency backing - under WPB restrictions. The Treasury has released 700,000,000 oz., a half-billion dollars' worth...
...metal, silver started as a substitute for tin, copper and other critical metals, was soon found superior to them in many ways. Silver has many ideal properties: it resists corrosion better than any other metal, is little affected by atmospheric conditions, is extremely malleable, and is an excellent conductor of heat and electricity. Some of its uses...
...bars (electricity conductors), replacing copper. Aluminum and magnesium plants have borrowed tons of silver from the Treasury for this job, must return every ounce in five years...
...solder (lead and 2½% silver), which has been found cheaper and stronger than tin solder...