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3.4 Fiberglass. 3.5 Carbon Fiber. 3.6 ... particularly for portable radio services and low-power FM radio stations. ... church towers, flag poles, water tanks and ...
Folding tent technology consists of spring-loaded poles and sturdy fabric that allow them to automatically lift and unfold from a packed round form factor into a tent. [ 5 ] [ 6 ] [ 7 ] The poles are designed to flex in the open position, lifting and stretching the tent fabric as it straightens out.
The poles provide structural support. They may be collapsible for easier transport and storage. Some designs use rigid poles, typically made of metal, or sometimes wood. Other designs use semi-rigid poles, typically made of fiberglass, or sometimes of special metal alloys. Another pole type uses inflatable beams as the structural support.
The horizontal and vertical poles were each made of one-inch aluminum tubes in two telescoping parts, anodized with a gold color. Due to the limits of the astronauts' spacesuits, the total height of the flagpole was limited to their 28-inch (71 cm) minimum and 66-inch (170 cm) maximum reach. The flag cost $5.50 and the tubing cost $75. [2]
Whip antennas for portable radios are often made of a series of interlocking telescoping metal tubes, so they can be retracted when not in use. Longer whips, made for mounting on vehicles and structures, are made of a flexible fiberglass rod around a wire core and can be up to 11 m (35 feet) long.
Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth .
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