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2. A-Jacks - Wikipedia

   en.wikipedia.org/wiki/A-Jacks

   For example, rock can weigh between 150-175 lb; [2] a suitable rip-rap boulder comparable to a 96 inch A-Jacks unit (about 36 c.f.) would weigh about 5800 pounds, about 16% more than the A-Jacks unit. A-Jacks also have the advantage of being interlocking and self-stabilizing.

3. Jack (device) - Wikipedia

   en.wikipedia.org/wiki/Jack_(device)

   In a floor jack (aka 'trolley jack') a horizontal piston pushes on the short end of a bellcrank, with the long arm providing the vertical motion to a lifting pad, kept horizontal with a horizontal linkage. Floor jacks usually include casters and wheels, allowing compensation for the arc taken by the lifting pad.

4. Trailer (vehicle) - Wikipedia

   en.wikipedia.org/wiki/Trailer_(vehicle)

   The basic function of a trailer jack is to lift the trailer to a height that allows the trailer to be hitched or unhitched to and from the towing vehicle. Trailer jacks are also used for leveling the trailer during storage. The most common types of trailer jacks are A-frame jacks, swivel jacks, and drop-leg jacks.

5. Strand jack - Wikipedia

   en.wikipedia.org/wiki/Strand_jack

   Animation of a strand jack. Strand jacks can be used horizontally for pulling objects and structures, and are widely used in the oil and gas industry for skidded loadouts. Oil rigs of 38,000 t have been moved in this way from the place of construction on to a barge. Since multiple jacks can be operated simultaneously by hydraulic controllers ...

6. Torsion bar suspension - Wikipedia

   en.wikipedia.org/wiki/Torsion_bar_suspension

   A gun stabilizer must be used to compensate for the rocking motion. Due to the massive weight of a main battle tank, compared to an automobile, there is a much greater risk of breaking a torsion bar on sudden bumps or maneuvers, and if it is not replaced in short order the reduced suspension can affect the maneuverability of the vehicle, and in ...

7. House adopts contentious rules that make ousting speaker more ...

   www.aol.com/news/house-adopts-contentious-rules...

   (The Center Square) – After a brief and intense debate, lawmakers passed the Republican-proposed House rules package, 215-209, for the incoming 119th Congress Friday evening. Besides typical ...