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