{HEAD ~ The eccentric discs} 213 and the cranks 223 are all mounted with {TAIL ~ their lines} of throw, in parallel and parallelism is maintained as the cranks 223 and eccentric discs 213 rotate 
are all mounted with
{ HEAD ~ The eccentric discs } 213 and the cranks 223 are all mounted with { TAIL ~ their lines } of throw , in parallel and parallelism is maintained as the cranks 223 and eccentric discs 213 rotate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH