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