{HEAD ~ The present invention} relates to {TAIL ~ 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 a core soot using the apparatus 
relates to
{ HEAD ~ The present invention } relates to { TAIL ~ 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 a core soot using the apparatus
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL 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