The present invention relates to an apparatus for manufacturing a core soot in a step for manufacturing an porous optical fiber soot according to a VAD method, and to a method for manufacturing of {HEAD ~ a core soot} using {TAIL ~ the apparatus} 
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The present invention relates to an apparatus for manufacturing a core soot in a step for manufacturing an porous optical fiber soot according to a VAD method , and to a method for manufacturing of { HEAD ~ a core soot } using { TAIL ~ the apparatus }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL