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The bottom of the two-story g is a loop; the very short stroke at the top is the ear. [10] The letters i j each have a dot or tittle. [10] A short horizontal stroke, as in the center of e f and the middle stroke of E F, is a bar. Strokes that connect, as in A and H, or cross other strokes, as in t, are also known as crossbars. [9]
Bicycle frame in steel tube, notched at the joints before TIG welding or brazing. Tube notching is commonly performed before joining light-gauge tubes to make a tee or similar joint, as by welding. Either one or both tubes may be notched before assembly. A familiar example of tube notching is in the manufacture of bicycle frames.
In a three-point bend test, a fatigue crack is created at the tip of the notch by cyclic loading. The length of the crack is measured. The specimen is then loaded monotonically. A plot of the load versus the crack opening displacement is used to determine the load at which the crack starts growing.
The calisthenics version of the flutter kick is often used as an intensive training tool in the military. They help to develop the hip flexors, abdominal muscles and leg muscles. Flutter kicks are a four-count exercise. Starting position is lying flat on the back with the feet and head approximately 6 inches (15 cm) off the ground.