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dongguan napu electronic technology co., ltd. ( www.napui.com） it is a professional manufacturer of digital power meter, power meter, electrical parameter measuring instrument, temperature recorder, dc power supply, variable frequency power supply, electrical parameter tester, power analyzer, power meter, energymeter， the manufacturer of power tester, which provides digital power meter, electrical parameter tester, and temperature recorder. the products under napp technology are of excellent quality, and all products can be applied for free trials. welcome to call us for consultation
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yuyao tenghui temperature control instrument factory mainly sells paperless recorders, temperature control instruments, patrol instruments, temperature and humidity controllers.
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