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