OMS Holdings Pte. Ltd. Holding company of OMS group of companies specialized in tubular threading service and OCTG-related accessories supply
Petro Summit Pte. Ltd. International trade of crude oil and petroleum products
SC Asian Tubular Supply Pte. Ltd. Oil Country Tubular Goods (OCTG) Supply Chain Management service
Sumitomo Corporation Capital Asia Pte. Ltd. Financial services for group companies
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