In this regard, {HEAD ~ the cross section} of {TAIL ~ the periphery} of the housing 63 typifies a trapezoid while the dust bag cross section is maintained as a rectangle 
of
In this regard , { HEAD ~ the cross section } of { TAIL ~ the periphery } of the housing 63 typifies a trapezoid while the dust bag cross section is maintained as a rectangle
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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