A guide for use with a portable power saw has {HEAD ~ a cutting tool} which revolves about {TAIL ~ an arbor} in order to cut a surface 
revolves about
A guide for use with a portable power saw has { HEAD ~ a cutting tool } which revolves about { TAIL ~ an arbor } in order to cut a surface
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 OTH OTH OTH OTH OTH OTH