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6【Lau Mo】LEGO EV3 Helicopter《AH-64 Apache 阿帕契直升機》building instructions of 45544 MINDSTORMS Core Set - YouTube
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LEGO MINDSTORMS EV3 Education 45544 Instructions - Robot Square | Lego education, Lego mindstorms, First lego league
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LEGO MOC helicopter/copter used 45544(mindstorms ev3) by lego-dennis | Rebrickable - Build with LEGO
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