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Massa
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Designer and manufacturer of electroacoustic products including sensors, transducers, and ultrasonics.
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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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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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