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Advanced Crystal Technology
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A supplier of frequency control products offering standard and custom quartz crystals, crystal filters, oscillators and ceramic resonators.
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Poseidon Scientific Instruments
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Makers of low phase noise sapphire oscillators, regenerative dividers, microwave amplifiers, whispering gallery mode resonators and carrier suppression interferometers.
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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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