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