For more information, please contact us:

THE DIPPER TECHNO CHEMISTRY INSTITUTE, BEIJING

P. O. Box : Beijing 603 BDTI P.R.CHINA 100190
Call010-8264.0226;
Fax: 010-8264.0221;
web: http://www.BD-research.com              http://www.bigdipper-technochem.com
email: support@big-dipper.us; sales@big-dipper.us;                  sun@fullsense.com      sales@bigdipper-technochem.com