The magnetic switch may further include, for example, {HEAD ~ a first switching contact} and {TAIL ~ a second switching contact} 
The magnetic switch may further include , for example , { HEAD ~ a first switching contact } and { TAIL ~ a second switching contact }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL