fuel-return valve (FRV)

check valve / non-return valve

non-return valve / check valve

flight readiness vehicle (FRV)

fuel needle valve

fuel tank selector valve

fuel discharge valve

fuel inlet line shutoff valve

fuel shutoff valve lever

fuel valve

fuel shut-off valve

Proton Exchange Membrane Fuel Cell (PEM fuel cell, PEMFC)

land return

return load

return to duty (RTD)

return fire

return to base (rtb)

return-to-base mode

brake shoe return spring

in return for information

vehicle casualty return

failure to return to battery

lump sum on return

oil return line

return port

return freight

return passage

return trip

return-flow wind tunnel

non-return-flow wind tunnel

ground return signal

point of return

administrative return