Power may be applied to any of the crankshafts by a motor coupled to the crankshaft or power may be applied to {HEAD ~ any crankpin} by a pitman connecting the piston of an internal combustion engine or fluid motor to {TAIL ~ the crankpin} 
Power may be applied to any of the crankshafts by a motor coupled to the crankshaft or power may be applied to { HEAD ~ any crankpin } by a pitman connecting the piston of an internal combustion engine or fluid motor to { TAIL ~ the crankpin }
OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL