How to Do Senegalese Twists. Senegalese twists are a popular protective hairstyle for Afro-textured hair sported by many trendy, chic women. The look can be created with hair extensions and is easier to do than microbraids, cornrows, and...
Linear-motion bearing. A linear-motion bearing or linear slide is a bearing designed to provide free motion in one direction. There are many different types of linear motion bearings. Motorized linear slides such as machine slides, XY tables, roller tables and some dovetail slides are bearings moved by drive mechanisms.
The two major types of slides are rotational slides and translational slides. Rotational slide: This is a slide in which the surface of rupture is curved concavely upward and the slide movement is roughly rotational about an axis that is parallel to the ground surface and transverse across the slide (fig.