In this manner, the atmosphere, acting as a control pressure, is introduced into {HEAD ~ a variable pressure chamber} defined within {TAIL ~ the housing} 
defined within
In this manner , the atmosphere , acting as a control pressure , is introduced into { HEAD ~ a variable pressure chamber } defined within { TAIL ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL