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APC International, Ltd.
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A manufacturer of piezoelectric ceramics and piezoelectric products for customers in aerospace, automotive, consumer, engineering and design, industrial, manufacturing, medical products, military.
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Chintele Quartz Technology Co Ltd
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A Chinese 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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Changzhou Union Electronics
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Manufacturers of buzzers and speakers used in computer modems, mobile phones, cordless phones and pagers.
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Lubell Labs Inc.
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Manufacturer of underwater loudspeakers, underwater speakers, and piezoelectric underwater audio transducers.
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