MP4, and other fields. The company has improved the production testing and test equipment. Such as the 100,000-purification plant. Muffler room. Vibration tester. High Low Temperature and Humidity test equipment. Automated test instrument, such as frequency response everything. Guarantee the stability of the product. Company was in 2001 adopted the ISO9001: 2000 international quality system certification. Improve the company's quality systems and organizational structure.

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