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2005
Beijing Polytex was established
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2006
Finished Beijing Subway 5# third rail cover system project
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2007
ISO9001 Quality system certification
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2008
ualified supplier in Toshiba, China railway & Baoding Huiteng Wind energy Equipment.
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2009
Finished Beijing Subway Yizhuang Line project
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2010
Qualified supplier in ABB , Xinhuadu Transformer
