KSR Certification,
DNV Certification,
TÜV Rheinland,
SGS Korea,
QA Korea Certification,
Korea Foundation for Quality,
Korean Standards Association,
KEPCO KPS,
KEPCO,
KHNP,
Doosan Enerbility,
Samsung C&T Corporation,
Hyundai Rotem,
Hyundai Industries Turbo Machinery,
Hyundai Everdigm,
Bumhan Industries,
Jinyoung TBX,
Sunyoung Systech,
Sungil SIM,
PK Valve & Engineering,
S&S Valve,
Korea Industrial Testing Co., LTD,
Korasol,
Samyoung Mitech,
KOMOTO,
Seongsan Enterprise,
KNT,
Yuho Electric,
DYM Co., LTD,
Ecopowertech,
APEC,
Yujincometal Co., Ltd.,
NOAH Actuation,
HANKUKUCISCO,
Anam Heavy Industry,
DONGSUNG E & I,
Daehan DH Development,
T BOG,
Kangseo Heavy Industries ,
Hyundai Valve,
Latoz,
Daon Technology,
Woochang E&C,
Sungshin E&C,
Yunsol Tech,
GANA Co., LTD.,
Etc.
