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・ Ropar (Lok Sabha constituency)
・ Ropar Wetland
・ Ropars
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・ Ropata Te Ao
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Rope
・ Rope (1957 film)
・ Rope (data structure)
・ Rope (disambiguation)
・ Rope (film)
・ Rope (play)
・ Rope (rhythmic gymnastics)
・ Rope (song)
・ Rope (torture)
・ Rope (unit)
・ Rope a Dope Style
・ Rope access
・ Rope and Breasts
・ Rope and Skin
・ Rope and Summit


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Rope : ウィキペディア英語版
Rope

A rope is a group of yarns, plies, or strands that are twisted or braided together into a larger and stronger form. Ropes have tensile strength and so can be used for dragging and lifting, but are too flexible to provide compressive strength. As a result, they cannot be used for pushing or similar compressive applications. Rope is thicker and stronger than similarly constructed cord, line, string, and twine. Ropes made from metal strands are called wire rope.
==Construction==

Rope may be constructed of any long, stringy, fibrous material, but generally is constructed of certain natural or synthetic fibres. Synthetic fibre ropes are significantly stronger than their natural fibre counterparts, but also possess certain disadvantages, including slipperiness.
Common natural fibres for rope are manila hemp, hemp, linen, cotton, coir, jute, straw, and sisal. Synthetic fibres in use for rope-making include polypropylene, nylon, polyesters (e.g. PET, LCP, HDPE, Vectran), polyethylene (e.g. Dyneema and Spectra), Aramids (e.g. Twaron, Technora and Kevlar) and acrylics (e.g. Dralon). Some ropes are constructed of mixtures of several fibres or use co-polymer fibres. Wire rope is made of steel or other metal alloys. Ropes have been constructed of other fibrous materials such as silk, wool, and hair, but such ropes are not generally available. Rayon is a regenerated fibre used to make decorative rope.
The twist of the strands in a twisted or braided rope serves not only to keep a rope together, but enables the rope to more evenly distribute tension among the individual strands. Without any twist in the rope, the shortest strand(s) would always be supporting a much higher proportion of the total load.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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