ROUND VOLUME DAMPER VOLUME DAMPER FIRE DAMPER & ROUND FIRE DAMPER FIRE VOLUME DAMPER ROUND FIRE VOLUME DAMPER PISTON RELEASOR DAMPER CURTAIN FIRE DAMPER AIR TIGHT DAMPER BACK DRAFT DAMPER FIRE VOLUME DAMPER (»ê¾÷¿ë) F.V.D HANDLE (»ê¾÷¿ë) VOLUME DAMPER DAMPER HANDLE DAMPER BLADE DAMPER LINK BLAED DAMPER HANDLE ACCESS DOOR AIR EXTRACTORS TURNING VANES Á¦¸ñ³»¿ëÀÛ¼ºÀÚ ~