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  2. Pullback motor - Wikipedia

    en.wikipedia.org/wiki/Pullback_motor

    A pullback motor (also pull back, pull back and go or pull-back) is a simple clockwork motor used in toy cars. A patent for them was granted to Bertrand 'Fred' Francis in 1952 as a keyless clockwork motor. Pulling the car backward (hence the name) winds up an internal spiral spring; a flat spiral rather than a helical coil spring. When released ...

  3. Pull-rod suspension - Wikipedia

    en.wikipedia.org/wiki/Pull-rod_suspension

    In cars, suspension refers to the system by which the vehicle maintains contact between all of its wheels and the ground. This is commonly achieved via use of dampers and springs, providing downward forces on the wheels to counteract impact shocks. However, in push-rod suspension systems, this strut is mounted across the chassis, parallel to ...

  4. Push–pull train - Wikipedia

    en.wikipedia.org/wiki/Push–pull_train

    A push–pull train with two control cars and a locomotive in the middle. Push–pull is a configuration for locomotive -hauled trains, allowing them to be driven from either end of the train, whether having a locomotive at each end or not. A push–pull train has a locomotive at one end of the train, connected via some form of remote control ...

  5. Pulled Muscle in Lower Back: Symptoms, Causes, and Treatment

    www.healthline.com/.../pulled-muscle-in-lower-back

    A pulled muscle occurs when you tear or overstretch some of the muscle fibers. This can happen if you overwork the muscle or twist it too hard. You will probably notice pain and swelling, and the ...

  6. Make sure your hands are a little more than shoulder-width apart. Press your shoulders down. Bring your shoulder blades toward each other, as if you are trying to use them to squeeze a lemon. Lift ...

  7. Back Muscles: Types, Functions, and How to Strengthen Them

    www.webmd.com/fitness-exercise/back-muscles-what...

    Rhomboids — these muscles connect your scapula to the spine and help you bring your shoulders inward. Trapezius (traps) — these extend from the neck to the lower back in a V shape and allow ...

  8. Rack Pull: Benefits, Considerations, and How-To - Healthline

    www.healthline.com/health/fitness/rack-pull

    Place the barbell on the rack supports and load the desired amount of weight on each side. Step up to the barbell, and with a shoulder-width stance, get into position by bending the knees and hips ...

  9. Aerial tramway - Wikipedia

    en.wikipedia.org/wiki/Aerial_tramway

    Aerial tramway. An aerial tramway, aerial tram, sky tram, aerial cablecar, aerial cableway, telepherique, or seilbahn is a type of aerial lift which uses one or two stationary ropes for support while a third moving rope provides propulsion. [1]

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