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Environmental-Management-System-CertificateJuly 31, 2015
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Explosion-proof certificateJuly 31, 2015
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QualityManagementSystem-CertificateJuly 31, 2015
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EU CE certificationJuly 31, 2015
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Invention patentJuly 31, 2015
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Chu Yi measurement and control trademark certificateJuly 31, 2015