December 2014 audit through the A2 class III low, medium pressure container replacement work, the date of issue February 25, 2014.

2010, the first time when the replacement, through the successful acquisition of manufacturing license escalation forensic work, to obtain A2 class third low, medium pressure vessel manufacturing license, the date of issue February 8, 2010 is.

2006, the first audit by obtaining D1, D2 pressure vessel manufacturing license, the date of issue January 27, 2006.