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FD Rectangular Fire Damper FVD Rectangular Control & Fire Damper　 FDR Round Fire Damper FVDR Round Control & Fire Damper FSDM Rectangular Smoke and Fire Damper (Manual) FSDA Rectangular Smoke and Fire Damper (Electrical) SDM Rectangular Smoke Damper (Manual) SDA Rectangular Smoke Damper (Electrical) SPMR Louver Type Smoke Damper (Manual) SPAR Louver Type Smoke Damper(Electrical) SRM Manual Reset Single Blade Operated Smoke Damper SRA Electric Reset Single Blade Operated Smoke Damper SFDM Rectangular Smoke & Fire Damper (Manual) SFDA Rectangular Smoke & Fire Damper (Electrical) SFMR Louver Type Smoke & Fire Damper (Manual) SFAR Louver Type Smoke & Fire Damper (Electrical) FDC3 Spring Activated Curtain Fire Damper (Static) FDCD3 Spring Activated Curtain Fire Damper (Dynamic) FDCDH3 Spring Activated Curtain Fire Damper (Dynamic) SD Vane Type Smoke Damper FSD Vane Type Smoke & Fire Damper FDN Mechanical Linkage Operated Fire Damper SPG Louver Type Smoke Damper SPGR Louver Type Smoke Faceplate Damper