... rolls Stepless pressure regulation S-Roll calenderMain applications:l Luggage and Backpacks, Parachutes, Kites, Sailing boat, Umbrellas, Beach chairs ... The S-Roll roller is controlled by hydraulic system.l The S-Roll roller is auxiliary driven by oil motor.l HMI ( ... animated display, hydraulic system pressure display, fault diagnosis, alarm information)l Roller sleeve change is quick and easy, no need ...