{HEAD ~ The process} 1, wherein {TAIL ~ the tubular film} is subjected to biaxial orientation before reaching nip rolls 
{ HEAD ~ The process } 1 , wherein { TAIL ~ the tubular film } is subjected to biaxial orientation before reaching nip rolls
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH