Nov 16, 2015 · Just FYI: The US patent office is filled with early designs for mechanical sexual devices. People have been making sex machines since the invention of Cleopatra’s bumblebee-powered vibrator. In.
The linear guides were designed to work much like linear bearings but have the advantage of being more cost-effective. These guides were made from a 1.25'' x 2.25'' x 10.25'' block of a material called delrin.
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