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