SBKJ GROUP is an exclusive worldwide supplier of rectangular , round and oval air duct machines. We have agent in *****, Brazil, Ukraine etc. Best quality , perfect after service and low prices are our long standing guarantor of success Business: spiral tube former;elbow maker;plasma cutter;bending machine;seam welder;square duct autoline ;shearing machine;lock former;TDC/TDF flange forming machine;angle and flat metal round machine;colored steel roof tile forming machine;sandwich panel forming machine;C-type , Z-type forming machine;Production line of H-type;Large span color steel no-girder equipment;Punch;leveling machine;series cut to length line;slitting machine;elevator platform;