A crankshaft 1 wherein said crankshaft body is steel and said {HEAD ~ balancer weights} are {TAIL ~ iron} 
are
A crankshaft 1 wherein said crankshaft body is steel and said { HEAD ~ balancer weights } are { TAIL ~ iron }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL