By comprising the pressure difference adjusting means, it is possible to eliminate the difference in fluid pressure between the inside and the outside of the hollow part caused by the change in fluid temperature and to prevent the destruction of the membrane due to {HEAD ~ the deformation} of the membrane caused by {TAIL ~ the difference} in pressure 
By comprising the pressure difference adjusting means , it is possible to eliminate the difference in fluid pressure between the inside and the outside of the hollow part caused by the change in fluid temperature and to prevent the destruction of the membrane due to { HEAD ~ the deformation } of the membrane caused by { TAIL ~ the difference } in pressure
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH