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JAN Crystals
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Manufacturer of crystal oscillators and microprocessor, AT-Strip, and custom designed crystals.
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How Crystal Watch Works
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Impartial description describes how quartz crystals, quartz watches and quartz clocks work.
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Hec, Inc.
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Manufacturer of frequency control devices.
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Q-Tech Corporation
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A crystal oscillator manufacturer - hi reliability military QPL, space, hi temperature XO, VCO, VCXO, TCXO, OCXO.
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