Although not shown, {HEAD ~ the CD/DVD drive} generally includes {TAIL ~ drive components} for reading and writing a compact disc and a digital Versatile disc and transport components for carrying the CD and DVD discs to and from the drive components 
generally includes
Although not shown , { HEAD ~ the CD / DVD drive } generally includes { TAIL ~ drive components } for reading and writing a compact disc and a digital Versatile disc and transport components for carrying the CD and DVD discs to and from the drive components
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH