In a space between the wall and {TAIL ~ bag}, a plurality of {HEAD ~ pressure sensors} are positioned 
In a space between the wall and { TAIL ~ bag } , a plurality of { HEAD ~ pressure sensors } are positioned
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH