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Award of Metallurgical science and technology
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Award of Henan Metallurgical technology progress
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Award of Metallurgical technology technology
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Ministry of Metallurgical Industry science technology improvement award
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steel wire prodcuts infomation assocation
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Wu Yi labor certificate
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national key & new products certificate
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award certificate
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certificates
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national quality supervision and inspection center for metal products
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Metal products engineering technology research center of Henan
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Secondary qualification unit
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