The container, or {HEAD ~ housing}, also has {TAIL ~ a membrane} at an opening thereof which is permeable to oxygen 
has
The container , or { HEAD ~ housing } , also has { TAIL ~ a membrane } at an opening thereof which is permeable to oxygen
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH