{HEAD ~ The housing}, which installs the OSAs, the optical member and the inner fiber, is made of {TAIL ~ metal} and has a grooves into which the inner fibers is set so as to arrange them orderly 
{ HEAD ~ The housing } , which installs the OSAs , the optical member and the inner fiber , is made of { TAIL ~ metal } and has a grooves into which the inner fibers is set so as to arrange them orderly
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH