Siri Jirapongphan

National Petrochemical Public Co. Ltd. produces and distributes olefins, which consists of ethylene and propylene. The company is headquartered in Bankok, Thailand.

The State Railways of Thailand is a company headquartered in Bangkok, Thailand and ultimately controlled by the Government of Thailand. The firm operates railways in Thailand.

Port Authority of Thailand provides port and harbor support services to its flagship Bangkok and Laem Chabang ports and five regional ports across the country. The company was established in 1951 and is headquartered in Bangkok, Thailand.

LPN Plate Mill Public Co. Ltd. is a company based in Thailand that specializes in the production of hot rolled steel plates and coils. The company also operates a testing laboratory to ensure that their products meet international standards. LPN Plate Mill has been approved by various organizations and has received certificates of laboratory accreditation. The company provides information on their website about the production process, weight calculation formulas, and corrosion protection techniques for buyers. The company also has a section on their website for career opportunities and contact information.