ManualsLib This handy web application can help you save both time and effort as you browse the web to find a particular manual.

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Electude Simulator Allows you to diagnose and repair failures in three progressive levels of difficulty.

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MecaBricks Build & Render your 3D LEGO models online

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HowStuffWorks explains thousands of topics, from engines to lock-picking to ESP, with video and illustrations so you can learn how everything works.

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Tinkercad Start designing in 3D. If you can dream it, you can build it. From product models to printable parts, 3D design is the first step in making your ideas real.

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