Word: shatterproof
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Dates: during 1970-1979
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...meeting underscored the drive toward detente based on mutual self-interest-especially economic self-interest on the part of the Soviets, who want trade and technology from the West. None of the agreements are shatterproof, and some will lead only to future bargaining. But the fact that they touched so many areas suggested Nixon's strategy: he wanted to involve all of the Soviet leadership across the board -trade, health, science-in ways that would make it difficult later to reverse the trends set at the summit...
...which set the new requirement to reduce eye injuries, was precise in its standards. The lenses will not be unbreakable or shatterproof, but they must be sufficiently tempered to withstand a specific shock-a steel ball weighing .56 oz. dropped from a height of 50 in. The optician is supposed to make the drop test, aiming at the center of the lens, before releasing the glasses...