... perfect over-current, over-voltage, open-phase, over-temperature alarm function and other automatic protection of electronic circuit12. ... aluminum alloy, duralumin alloy, wrought aluminum alloy, extra super duralumin alloy, cast aluminum alloy, AL-So series aluminum ... assurance system24. Complete user’s manual and instruction Aircraft Engine Starting Power Supply, Efficiency>90%, lifespan>20 Years,50 ...