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person:("song shiyu")
Vehicle arrival confirmation method, electronic equipment and computer readable storage medium
Windshield alcohol anti-icing system integrated structure
Fixed hinge type flap design structure of NASA MS (1)-0317 airfoil profile
Airplane multi-gas-cylinder centralized oxygen supply system and method
Mechanical control box with double-spring acting mechanism
Helicopter cable descending support installed in two-point mode
Self-locking multi-air-supply-port synchronous control system