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