Since the joint between the housing and the container has been sealed, {HEAD ~ the further increase} in fluid pressure is applied to {TAIL ~ only the upper side} of the container 
Since the joint between the housing and the container has been sealed , { HEAD ~ the further increase } in fluid pressure is applied to { TAIL ~ only the upper side } of the container
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH