{HEAD ~ A cam shaft} of an engine is provided with {TAIL ~ a timing change mechanism} which is driven by hydraulic pressure to alter the timing of a intake valve  
is provided with
{ HEAD ~ A cam shaft } of an engine is provided with { TAIL ~ a timing change mechanism } which is driven by hydraulic pressure to alter the timing of a intake valve
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH