... field 4. reliable quality and reasonable price CRANE CONTROL PUSHBUTTON, Position Spring Return Selector Switch. AC. 50 or 60HZ, rated voltage to ... and stop of remote and widely used in wharf, machine tools, textile machineries, etc. Other specifications: 10 lines, 8 lines, 6 lines ... vibration frequency is 2-80HZ, the acceleration is 0.79; remote control switch