... or the alarm bell to alert the superintendent of elevator.3.Full collective operationUp/down hall call button are set to ... Wheel,Guide wheel,Guide shoe,Pull burst,Fan,Lock.Bell.Rrope gripper, Door vane,Door slider,Oil pan,Tracing machine,Round cable.Flat ... cable, Landing display, Controller,limit switch,swith for landing door,push button,key switch,etc(Standard:EN81)9)Escalator parts: Step,Yellow ...