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AXTAL
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Manufacture of crystal oscillators PXO, VCXO, TCXO, OCXO, DOCXO, crystal resonators (quartz, langasite lgs, galliumphosphate gapo4), crystal filters, gps-ocxo, clock recovery modules cdr.
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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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Hec, Inc.
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Manufacturer of frequency control devices.
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