which bipropellant rocket engine has a chamber pressure under 172.0 and uses oxidizer of lox?
(AND spaceflight.bipropellant_rocket_engine (AND (JOIN spaceflight.bipropellant_rocket_engine.oxidizer m.01tm_5) (lt spaceflight.bipropellant_rocket_engine.chamber_pressure 172.0^^http://www.w3.org/2001/XMLSchema#float)))