A working piston reciprocates in one cylinder and is conventionally attached to a crankshaft by means of {HEAD ~ a connecting rod} and {TAIL ~ crankpin} 
A working piston reciprocates in one cylinder and is conventionally attached to a crankshaft by means of { HEAD ~ a connecting rod } and { TAIL ~ crankpin }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL