At the same time, it is possible to use {HEAD ~ materials} such as silver or copper for the squirrel cage rods and {TAIL ~ squirrel cage rings}, which materials are more favorable as far as the conductivity is concerned, and this is done in such a way that no undesirably high contact resistances between the squirrel cage rods and squirrel cage rings occur 
At the same time , it is possible to use { HEAD ~ materials } such as silver or copper for the squirrel cage rods and { TAIL ~ squirrel cage rings } , which materials are more favorable as far as the conductivity is concerned , and this is done in such a way that no undesirably high contact resistances between the squirrel cage rods and squirrel cage rings occur
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH 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