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