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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. Horse-drawn vehicle - Wikipedia

   en.wikipedia.org/wiki/Horse-drawn_vehicle

   A two-wheeled horse-drawn vehicle is a cart (see various types below, both for carrying people and for goods). Four-wheeled vehicles have many names – one for heavy loads is most commonly called a wagon. Very light carts and wagons can also be pulled by donkeys (much smaller than horses ), ponies or mules. Other smaller animals are ...

7. How to Perfect Pullups, Their Benefits, & More - Healthline

   www.healthline.com/health/pull-ups

   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 ...

8. Car suspension - Wikipedia

   en.wikipedia.org/wiki/Car_suspension

   Part of car front suspension and steering mechanism: tie rod, steering arm, king pin axis (using ball joints ). Van Diemen RF01 Racing Car Suspension. Suspension is the system of tires, tire air, springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two. [1]

9. 6 Rounded Shoulders Exercises to Correct Your Posture

   www.healthline.com/health/rounded-shoulders...

   Clasp your hands behind your back with thumbs pointing towards the floor. Stand tall, open your chest and move your hands back and towards the ceiling. Stop when you feel a stretch in the ...