It is a medical device approval number. It belongs to the medical device class 6857 - "disinfection and sterilization equipment and apparatus" class.
This medical device is a horizontal garden-shaped pressure steam sterilizer produced by Shanghai Huawen Medical Nuclear Instruments Co. Manufacturers address Shanghai Nanhua Road 65, Zip Code 201106. but this 2002 issued by the approval number has been in February 22, 2006 expiration, since then the production should not be this approval number. Later, the approval number was Shanghai Food and Drug Administration, Machinery (Quasi) Word 2005 No. 2571340, which was valid until December 31, 2007; it is estimated that the current approval number is Shanghai Food and Drug Administration, Machinery (Quasi) Word 2008 No. 2570429, and this approval number can be used until July 18, 2012," he said.
This information can be found on the State Food and Drug Administration's website.