An external rotor comprises {TAIL ~ an annular case} within which is {HEAD ~ the laminated stack} forming the motor drive members and end members at each side of the stack 
within is
An external rotor comprises { TAIL ~ an annular case } within which is { HEAD ~ the laminated stack } forming the motor drive members and end members at each side of the stack
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH REL HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH