Conventional spinning apparatus commonly used to form {TAIL ~ fibers} of {HEAD ~ polyethylene terephthalate} conveniently may be selected 
Conventional spinning apparatus commonly used to form { TAIL ~ fibers } of { HEAD ~ polyethylene terephthalate } conveniently may be selected
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH