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April and May 2017 news

2018-06-01T17:16:39+00:00 11 月 2nd, 2017|news|

May, 2017  Guang-Chao obtained UL rolling steel insulated fire doors 250F certification. May, 2017  Guang-Chao obtained UL 3 hours horizontal rolling steel fire doors certification. April, 2017  The Quality Management System of Guang-Chao has been approved by ISOQAR to the following standard ISO9001:2015.