The vacuum switch includes a movable connecting pin, {HEAD ~ a drive lever}, {TAIL ~ a spring}, and a stop 
The vacuum switch includes a movable connecting pin , { HEAD ~ a drive lever } , { TAIL ~ a spring } , and a stop
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH