Thus, {HEAD ~ motor} 23 may have {TAIL ~ multiple poles} 47a through 47d, for example, as symbolized in FIG 4a, which can be switched into and out of the motor circuit as required 
have
Thus , { HEAD ~ motor } 23 may have { TAIL ~ multiple poles } 47a through 47d , for example , as symbolized in FIG 4a , which can be switched into and out of the motor circuit as required
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL 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