A separator tube for {HEAD ~ insertion} into {TAIL ~ a collection tube} comprises a tubular member having one end closed by a plug 
into
A separator tube for { HEAD ~ insertion } into { TAIL ~ a collection tube } comprises a tubular member having one end closed by a plug
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH