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