The dust bag is angled relative to the wall and {HEAD ~ pressure sensors} fill {TAIL ~ the space} between the wall and dust bag 
fill
The dust bag is angled relative to the wall and { HEAD ~ pressure sensors } fill { TAIL ~ the space } between the wall and dust bag
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH