{HEAD ~ The second main body} and the second lens portion are made of {TAIL ~ a same polymer material} having a lower melting point and higher fluidity than polyether imide 
{ HEAD ~ The second main body } and the second lens portion are made of { TAIL ~ a same polymer material } having a lower melting point and higher fluidity than polyether imide
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH