The atmosphere which is introduced into {HEAD ~ the variable pressure chamber} is arranged to push back the piston, so that a control pressure which depends on the magnitude of a current passing through the solenoid can be generated within {TAIL ~ the variable pressure chamber} 
The atmosphere which is introduced into { HEAD ~ the variable pressure chamber } is arranged to push back the piston , so that a control pressure which depends on the magnitude of a current passing through the solenoid can be generated within { TAIL ~ the variable pressure chamber }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL