ITD SQ Joint venture

Italian Thai development public company limited

Italian Thai Hongsa Company limited

Khamkeut saen oudom Glod Mine Company limited

LDS Metal Work Company limited

LDS NDP Joint venture

Sahakol Equiment PCL.

Siemens (Thailand ) Company

Sandvik Mining and Construction Company

PWH (Thailand) Company

Hongsa Power Company limited

Flender AG Company

IMERYS MRD - ECC Company Limited

Electricity Generating Authority of Thailand (EGAT)

Cristalla (Thipsugar Kamphaengphet) Co.,Ltd

Hitachi Construction Machinery (Thailand) co.,ltd

Primary Educational Service Area Office (PEASO)

Ministry of Energy

Rajamangala University of Technology Lanna