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Lynx. The third most expensive fur, the lynx is a luxurious type of fur renowned for its silky, plush fur and the striking spots on its pelt. [29] The three most common types of lynx in the fur trade are the Canadian lynx, the bobcat, and the Russian lynx. Due to CITES regulations, special permits are required to trap, sell, and own lynx furs.
Ironclad warship. An ironclad was a steam-propelled warship protected by steel or iron armor constructed from 1859 to the early 1890s. The ironclad was developed as a result of the vulnerability of wooden warships to explosive or incendiary shells. The first ironclad battleship, Gloire, was launched by the French Navy in November 1859, narrowly ...
Material selection is a step in the process of designing any physical object. In the context of product design, the main goal of material selection is to minimize cost while meeting product performance goals. [1] Systematic selection of the best material for a given application begins with properties and costs of candidate materials.
Frigate. A sailing frigate of 1802. The French Penelope. Baden-Württemberg, lead ship of her class of frigates of the German Navy, currently the biggest frigates worldwide. A frigate ( / ˈfrɪɡət /) is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied.
The Janka hardness test ( English: / ˈdʒæŋkə /; [1] German: [ˈjaŋka] ), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear. [citation needed] It measures the force required to embed an 11.28-millimeter-diameter ( 716 in) steel ball halfway into a ...
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Wood ash from a campfire. Wood ash is the powdery residue remaining after the combustion of wood, such as burning wood in a fireplace, bonfire, or an industrial power plant. It is largely composed of calcium compounds along with other non-combustible trace elements present in the wood. It has been used for many purposes throughout history.
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