Address : 94 Phaholyothin 32 (Soi Senanikom 1), Phaholyothin Road, Ladyao, Chatuchak, Bangkok 10900. Tel. 0-2561-4963/7, 0-561-4322/8 Fax. (662) 561-4995/6 Map : Click here to see map. Online Contact : Office Center : ritta@ritta.co.th Engineer Department : engineer@ritta.co.th Design Department : design@ritta.co.th Estimate Department : estimate@ritta.co.th Personal Department : personal@ritta.co.th Procurement Department : procurement@ritta.co.th Account Department : account@ritta.co.th Finance Department : finance@ritta.co.th

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