... shafts,couplins,guides,gear reducer etc. Screw Jack Lifting System configurations screw jacks, bevel gearboxes, flex linking shafts, ... table following NOSEN engineers AutoCAD drawings. Screw Jack Lifting System features: 1. Heavy duty, positioning precision, uniform lift ... , self locking 2. Multiple jack system, from pair jacks system to fourteen jacks system 3. Electric driven, manual operated are ...