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