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Single-horn anvil A blacksmith working iron with a hammer and anvil A blacksmith working with a sledgehammer, assistant (striker) and Lokomo anvil in Finland. An anvil is a metalworking tool consisting of a large block of metal (usually forged or cast steel), with a flattened top surface, upon which another object is struck (or "worked").
The major varieties of shuriken are the bō shuriken (棒手裏剣, stick shuriken) and the hira shuriken (平手裏剣, flat shuriken) or shaken (車剣, wheel shuriken, also read as kurumaken). Shuriken functioned as supplementary weapons to the sword or to other weapons in a samurai's arsenal, although they often had an important tactical ...
Shurikenjutsu (手裏剣術) is a general term describing the traditional Japanese martial arts of throwing shuriken, which are small, hand-held weapons used primarily by the Samurai in feudal Japan, such as metal spikes bō shuriken, circular plates of metal known as hira shuriken, and knives ().
A tripwire-triggered pipe bomb mock-up used to train US military service personnel. A pipe bomb is an improvised explosive device (IED) that uses a tightly sealed section of pipe filled with an explosive material.
This F-5E was modified by NASA for a constant area beyond drag optimum to reduce the sonic boom. The NASA Shaped Sonic Boom Demonstration, also known as the Shaped Sonic Boom Experiment, was a two-year program that used a Northrop F-5E with a modified fuselage to demonstrate that the aircraft's shock wave, and accompanying sonic boom, can be shaped, and thereby reduced.