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Artist Lucy Telles and large basket, in Yosemite National Park, 1933 A woman weaves a basket in Cameroon Woven bamboo basket for sale in K. R. Market, Bangalore, India. Basket weaving (also basketry or basket making) is the process of weaving or sewing pliable materials into three-dimensional artifacts, such as baskets, mats, mesh bags or even furniture.
The Thury thread form had the crests rounded at 1 / 6 p and the roots rounded at 1 / 5 p so the thread angle was close to 47.5° but not exactly. This was simplified in the BA thread definition by defining the thread angle to be 47.5° exactly and the thread form to be symmetrical with a depth of 3 / 5 p.
The trapezoidal metric thread form is similar to the Acme thread form, except the thread angle is 30°. [4] [5] [6] It is codified by DIN 103. [7] While metric screw threads are more prevalent worldwide than imperial threads for triangular thread forms, the imperially sized Acme threads predominate in the trapezoidal thread form.
For example, AN6 bolt has a 3 ⁄ 8-24 thread [3] whereas an -6 AN fitting has a 9 ⁄ 16-18 thread. [ 4 ] Originally parts were made compliant to the specification MIL-F-5509, but they are now controlled under SAE AS (Aerospace Standards) specifications AS4841 through AS4843 and AS4875.
The Whitworth thread was the world's first national screw thread standard, [1] devised and specified by Joseph Whitworth in 1841. Until then, the only standardization was what little had been done by individual people and companies, with some companies' in-house standards spreading a bit within their industries.
Fletching is the fin-shaped aerodynamic stabilization device attached on arrows, bolts, darts, or javelins, and are typically made from light semi-flexible materials such as feathers or bark. Each piece of such fin is a fletch, also known as a flight [1] or feather. A fletcher is a person who attaches fletchings to the shaft of arrows.
Although a larger headset seemed technically sound, the industry standardized instead upon the Tioga "Avenger", or 1 1 ⁄ 8" size, and headsets or stems for these bikes are now hard to find. A solution for cherished machines is to fit reducing rings and convert to a 1 1 ⁄ 8 " headset, fork and stem.
The oche / ˈ ɒ k i /, also the throw line or toe line, in the game of darts is the line behind which the throwing player must stand. For steel tip darts, it is generally 7 ft 9 + 1 ⁄ 4 in (2.37 m) from the face of the dartboard, measured perpendicularly. This is the recognized world standard as set by the World Darts Federation and is used ...
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