{HEAD ~ An apparatus} for manufacturing an optical fiber soot, which comprises a core partition having an opening portion at core burner side provided on a periphery of {TAIL ~ a core burner}, in a reactor of the apparatus to be used in a conventional VAD method 
{ HEAD ~ An apparatus } for manufacturing an optical fiber soot , which comprises a core partition having an opening portion at core burner side provided on a periphery of { TAIL ~ a core burner } , in a reactor of the apparatus to be used in a conventional VAD method
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH