- Dae Kwang Engineeing
- Address:362-1,Soha 2-dong ,Gwangmyeong-si
- I-YES Co., LTD
- Address:36-13, Gangsong-ro 113beon-gil
- Century La
- Address:277-17,Seongsu-dong 2-ga ,Seongdong-gu
- ValueIN Co., Ltd.
- Address:#202, Juhan B/D, 834-45, Yuksam1-Dong, Kangnam-Gu,
- Winiamando Inc.
- Address:121,Maegok-ri ,Tangjeong-myeon ,Asan-si
- Skyliner Korea
- Address:524-12 Daun-dong, Joong-gu
- Intech-FA
- Address:413-5, Maetan 3dong
- Dong Hyun tech
- Address:13 JAEJAEGIRO 74, HWADO-EUP, NAMYANGJU-SI,
- Kyung Dong Industrial Co., Ltd.
- Address:509,Yongmi-ri ,Gwangtan-myeon ,Paju-si
- Hankook Eng, Co., Ltd
- Address:Saeshin 2-901, 306 Soju Woungsang
- Carrier Ltd
- Address:981-11,Jangdeok-dong ,Gwangsan-gu
- WELKO ENGINEERING
- Address:302-301, 880, Shinbong-dong, Suji-gu
- Trion Korea Co., Ltd.
- Address:#304,Bucheon Technopark, 192, Yakdae-dong ,Wonmi-gu, Bucheon-si
- Kpnc
- Address:Rm305, Seungjin Bldg.49-47, Nogosan-dong, Mapo-gu,121-807,
- Ene System Inc.
- Address:1577-4,Seocho-dong ,Seocho-gu
- Changjo21 CO., Ltd.
- Address:856-3 Gwanyangdong Dongangu
- Dae Hung Machinery Co.
- Address:374-17 NAEGOK-DONG,Naegok-dong ,Seocho-gu
- G.E
- Address:
- Carrier North America Home Comfort
- Address:
- Mytec Co., Ltd
- Address:Songjeong-dong,