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Old Technic bricks are still in use, mostly to build the skeleton of larger non-Technic models.

The Lego Technic line is mostly cars now but it does still exist. Also used heavily in the Mindstorms line.

https://www.lego.com/en-us/themes/technic

Technics of today are different. They are mostly beams with holes and pins. The old technics were bricks with interlocking bumps on the top as well as holes on the side for pins and axels.

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