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Materials Corp
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A manufacturer of piezoelectric quartz, quartz products and single crystal optical products for use in the telecommunications and general time and frequency industries.
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MMD Components
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Manufacturer of frequency control devices, specializing in crystals and oscillators.
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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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ValpeyFisher
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Crystals, clocks, oscillators, electronic quartz crystals, oscillators and filters, crystal-based timing devices, Matec, electronics, semiconductors.
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