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1999 Year

  It is April KMA-QA "ISO-14001"
It is December I&CPE`AK "QS9000, cung" acquisition

1998 Year

  The KMA-QA "it is a ISO-9002"

1995 Year

  November Industrial Advancement Administration "100PPM it is a quality" acquisition

1993 Year

  It is a December DSI-QA "ISO-9002 quality" acquisition

1988 Year

  It is a Industrial Advancement Administration "quality 1 grade enterprise" acquisition

1972 Year

  The UL is, (File No. E52483)
 
Class Is, cung one The steam pipe which is Terms of validity

ISO9002

  1993.12  

BSI-QA (British standard association)

  1993.12 ~ 1995.02
     

Continuation

  1995.02 ~ 1999.12
  2000. 4  

KMA-QA (Korean efficiency association)

  1999.12 ~ 2002.12
  2003. 3  

Korean standard association

  2003.03 ~ 2006.03
QS9000   1998.12  

I&cPE'AC-QA

  1998.12 ~ 2001.12
  2000. 4  

KMA-QA (Korean efficiency association)

  1999.12 ~ 2002.12
  2003. 3  

Korean standard association

  2003.03 ~ 2006.03