{TAIL ~ An elastically deformable elastic coupling member} is provided in a coupling mechanism interconnecting the motor and {HEAD ~ the valve element} 
{ TAIL ~ An elastically deformable elastic coupling member } is provided in a coupling mechanism interconnecting the motor and { HEAD ~ the valve element }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD