{HEAD ~ The armature} 23 and pole piece 24 are preferably fabricated from a magnetic material, such as {TAIL ~ soft iron} 
{ HEAD ~ The armature } 23 and pole piece 24 are preferably fabricated from a magnetic material , such as { TAIL ~ soft iron }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL