As the temperature and pressure in the housing is increased, the joint between the container and {HEAD ~ the housing sections} is sealed by pressing the upper and lower sections of the housing against the container under the influence of forces resulting from different amounts of of thermal expansion of components of {TAIL ~ the housing} 
As the temperature and pressure in the housing is increased , the joint between the container and { HEAD ~ the housing sections } is sealed by pressing the upper and lower sections of the housing against the container under the influence of forces resulting from different amounts of of thermal expansion of components of { TAIL ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL