When the wire is cut off accidentally, {HEAD ~ the weight} drops onto {TAIL ~ the operation rod} to depress the latter to switch the change over valve so that a servo motor is switched to make the guide vanes close at predetermined rates of change of the opening degree in respective operation modes 
drops onto
When the wire is cut off accidentally , { HEAD ~ the weight } drops onto { TAIL ~ the operation rod } to depress the latter to switch the change over valve so that a servo motor is switched to make the guide vanes close at predetermined rates of change of the opening degree in respective operation modes
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH