At CO2 overpressure in the interior of the packing container, {TAIL ~ the pressure relief valve} responds at a certain pressure difference, the liquid in the pores ruptures, the valve opens, and after pressure equalization the liquid layer in the pores is restored and blocks {HEAD ~ the passage} of gas 
At CO2 overpressure in the interior of the packing container , { TAIL ~ the pressure relief valve } responds at a certain pressure difference , the liquid in the pores ruptures , the valve opens , and after pressure equalization the liquid layer in the pores is restored and blocks { HEAD ~ the passage } of gas
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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