The switching device assumes, when {HEAD ~ the first switch} of {TAIL ~ the controlling device} is turned ON, a first condition wherein the first and second output parts are charged positive and negative respectively, and assumes, when the second switch of the controlling device is turned ON, a second condition wherein the first and second output parts are charged negative and positive respectively 
of
The switching device assumes , when { HEAD ~ the first switch } of { TAIL ~ the controlling device } is turned ON , a first condition wherein the first and second output parts are charged positive and negative respectively , and assumes , when the second switch of the controlling device is turned ON , a second condition wherein the first and second output parts are charged negative and positive respectively
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH