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