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  1. 1

    Simple activity demonstrates wind energy principles. 由 Roman, Harry T.

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    Article

    Simple activity demonstrates wind energy principles.
  2. 2

    Teach deflection concepts with Hacksaw blades and rubber bands. IN STEM. 由 Roman, Harry T.

    發表在 Tech directions
    Article

    Teach deflection concepts with Hacksaw blades and rubber bands. IN STEM.

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