📁 机械

Mechanical puzzles are small objects that require manipulation to achieve some result. Examples would be a Rubik's Cube or a ball stuck in a 3D maze.

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Integral Group Inc.

https://www.integralgroup.com/

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Ideal Design Inc.

http://ideal.4mg.com/

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Inter-Net Specialty Products Inc.

http://www.ispcanada.com/

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IOK: Institute of Surface Chemistry and Catalysis

http://www.uni-ulm.de/en/nawi/iok.html

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I Love Crosswords

http://www.ilovecrosswords.com/

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