means for controlling {HEAD ~ opening} and closing of throttle means regulating supply of fuel to {TAIL ~ said reciprocating internal combustion engine} 
means for controlling { HEAD ~ opening } and closing of throttle means regulating supply of fuel to { TAIL ~ said reciprocating internal combustion engine }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL