The moveable portion of the armature is substantially centered within the passage in response to {HEAD ~ the fixed portion} being engaged to {TAIL ~ the armature mounting structure} 
engaged to
The moveable portion of the armature is substantially centered within the passage in response to { HEAD ~ the fixed portion } being engaged to { TAIL ~ the armature mounting structure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL