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API/TS 29001   API/ISO 9001   API Q1   Korea South-east Power               Korea Southern Power   Korea Western Power   Korea South - East Power   Adjustable Orifice Valve (patent)               Soft Seated Knife Gate Valve (patent)   Registered the utility model right plane   New design for Utility Model   Certificate of INNO-BIZ               ISO 9001:2001 Certification   Doosan Heavy Industries