A method for forming multi layered fiber including {HEAD ~ a core}, a first layer, and {TAIL ~ a second layer} 
A method for forming multi layered fiber including { HEAD ~ a core } , a first layer , and { TAIL ~ a second layer }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL