Watch How It Works Helicopter Blades in Science Technology | Channify

Name: How It Works Helicopter Blades
Uploaded: 2013-12-05T21:56:00.000Z
Duration: 2 min 2 s
Description: AD FREE ANIMATIONS PLEASE SUBSCRIBE-DONATE 请订阅和捐助

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Published Dec 5, 2013

Channel shidifu111

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