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