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Mountain guide Alice Manfield with a long wooden walking pole in the early 1900s. When in use, modern trekking poles resemble ski poles as they have many features in common, such as baskets at the bottom to prevent the pole sinking through unstable surfaces, and rubber-padded handles and wrist straps to strengthen holding grip. Their maximum ...
This provided greater balance than one pole could provide and made pushing through the snow easier. [6] Early ski poles were made of pine and bamboo, materials which today are used for novelty poles. [6] US patents for steel ski poles began in 1933 when John B. Dickson invented a new design calling for the use of steel as the shaft material. [8]
Ananias Leki Dago (born 1970), Ivorian photographer; Leki (singer) (born 1978), Congolese singer; Leki Dukpa (born 1989), Bhutanese football player; Leki Fotu (August 23, 1998), American American football player; Leki Maka (born 1985), Tongan boxer
USBL (ultra-short baseline, also known as SSBL for super short base line) is a method of underwater acoustic positioning.A USBL system consists of a transceiver, which is mounted on a pole under a ship, and a transponder or responder on the seafloor, on a towfish, or on an ROV.
Many newer attenuators use crushable materials (like various kinds of foam) that create a crumple zone, absorbing energy. [2] Others flatten a corrugated steel guard rail section, or split a steel box beam. Friction. Some attenuators work by forcing a steel cable or strap through an angled slot or tube, converting kinetic energy into heat.
de Ram shock absorber installed on a 1933 Alfa Romeo 8C 2300 Monza Georges de Ram invented and manufactured hydraulically actuated friction shock absorbers during the 1920s and 1930s. These were a more sophisticated pattern, intended to provide variable, self-adjusting damping in order to work effectively at both low and high speeds.