Mechanical units designed to exert drive in two opposing instructions, propelling or drawing objects, kind the core of quite a few industrial and on a regular basis purposes. A easy lever, as an illustration, may be configured to both thrust an object away or draw it nearer. Extra advanced examples embody hydraulic rams and conveyor belts.
These opposing drive mechanisms are elementary to automation, materials dealing with, and varied manufacturing processes. Their historic growth, from fundamental hand-operated instruments to classy automated methods, has considerably improved effectivity and productiveness throughout industries. This capability to exactly management linear movement is crucial for duties starting from assembling delicate electronics to transferring heavy hundreds.
