Apart from the rotary adjustment about the axis of rotation, a switching function can be provided by moving {HEAD ~ the rotary button} in {TAIL ~ a direction} parallel relative to the axis of rotation 
Apart from the rotary adjustment about the axis of rotation , a switching function can be provided by moving { HEAD ~ the rotary button } in { TAIL ~ a direction } parallel relative to the axis of rotation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH