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X_ITE X3D Browser   VRML 97 specification example: Rotor node provides animation and serves as an ExternProtoDeclare example.

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     Original X3D model: ChopperRotor.x3d
X3D Examples Archive: https://www.web3d.org/x3d/content/examples/Basic/Vrml97Specification/ChopperRotorIndex.html

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