A splicer comprises {TAIL ~ a positioning device}, in which {HEAD ~ the fiber ends} in general have a residual offset 
in
A splicer comprises { TAIL ~ a positioning device } , in which { HEAD ~ the fiber ends } in general have a residual offset
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH REL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH