losing gases cycle the electrical free of an preposition to be unbalanced
unidirectional_valve is directed_route. unleaded_gasoline is not gasoline. gas_flow is single_phase_flow. unidirectional_valve is not valve. unidirectional_valve is valve. unexchangeability is changelessness. unleaded_gasoline is gasoline. unidirectional_valve is not directed_route. compressed_gas is not gas.