1987 / 05    Cera engineering established

1989 / 10    Siheung plant

1992 / 12    Specific thermal equipment licensed certified

1994 / 01    Class A certified licensed trade business

1994 / 12    Yeoju plant completed

1995 / 03    Registration of Trade Business

1997 / 12    Professional construction acquisition

2002 / 08    ISO 9001 certified manufacturer

2008 / 05    The certificate of R&D department

2009 / 01    Yeoju factory expansion

2011 / 02    The certificate of construction