
Qualification honor
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Design qualification2019-03-15
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Certificate of primary supply network of CNPC2009-12-30
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Quality management, environmental protection manag2009-12-30
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Patent certificate for utility model of jacketed b2009-12-30
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Patent certificate for utility model of compound s2009-12-30
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Invention patent certificate of expanding producti2009-12-30
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Certificate of high tech enterprise2009-12-30
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Patent certificate of high temperature butterfly v2009-12-30
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Invention patent certificate for separation and re2009-12-30