Nanyang Explosion Protected Electrical Apparatus Research Institute (CNEx)
Address: No. 20 North Zhongjing Road, Nanyang, Henan, P.R.China
Tel：+86 377 63258558 
Zipcode：473008
E-mail：cqst@cn-ex.com     intls@cn-ex.com

China National Quality Supervision and Test center for Explosion Protected Electrical Apparatus (CQST)
Address： No. 20 North Zhongjing Road, Nanyang, Henan, P.R.China 
Tel：+86  63259357
E-mail：cqst@cn-ex.com     intls@cn-ex.com

CNEx North America Office
Tel: +1 67 297 2519
Email: info@cnex-ccc.com

CNEX-Global B.V. 
Utrechtseweg 310, 6812 AR
Arnhem, the Netherlands
Tel: +31 85 485 4400
Website: http://www.cnex-global.com/