Hydraulic jacks and screw jacks serve the same basic purpose, allowing mechanics to lift and support heavy loads in the shop. That said, there are some pretty major differences in how they work ...

An excavator's hydraulic jack snapped in half, but an ingenious mechanic expertly repairs it, restoring full functionality. This impressive video demonstrates the process of fixing a major machinery ...

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When designing a workout, it's important to move in all of the body's planes. What are they? Here's an anatomy primer to help.