{TAIL ~ The cranks} of adjacent pairs of cranks are interconnected by a common crankshaft, therefore all of {HEAD ~ the cranks} are interconnected and rotate together about a common axis 
{ TAIL ~ The cranks } of adjacent pairs of cranks are interconnected by a common crankshaft , therefore all of { HEAD ~ the cranks } are interconnected and rotate together about a common axis
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH