Connecting ducts between gas cushions can include venturis that restrict {TAIL ~ pressure pulses} in one gas cushion from traveling to {HEAD ~ another gas cushion} 
Connecting ducts between gas cushions can include venturis that restrict { TAIL ~ pressure pulses } in one gas cushion from traveling to { HEAD ~ another gas cushion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD