throttle valve opening sensing means connected to {HEAD ~ said throttle valve} for generating {TAIL ~ an electrical signal} corresponding to the opening of said throttle valve 
throttle valve opening sensing means connected to { HEAD ~ said throttle valve } for generating { TAIL ~ an electrical signal } corresponding to the opening of said throttle valve
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH