Quartz crystals
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R.H.O.
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Article
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1943
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Elsevier Science
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English
โ 87 KB
Quartz crystals are urgently needed in large quantities for making quartz crystal oscillator plates used in radio equipment for the armed forces. At present all of the quartz used for this purpose comes from Brazil. This supply is not sufficient, however, and it is necessary to find and develop furt