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A fishplate joins two lengths of track. A fishplate, splice bar or joint bar is a metal connecting plate used to bolt the ends of two rails into a continuous track. The name is derived from fish, [1] a wooden reinforcement of a "built-up" ship's mast that helped round out its desired profile. [2] The top and bottom faces taper inwards along ...
Ancient Greek crafts (or the craftsmanship in Ancient Greece) was an important but largely undervalued, economic activity. It involved all activities of manufacturing transformation of raw materials, agricultural or not, both in the framework of the oikos and in workshops of size that gathered several tens of workers.
Metal casting. In metalworking and jewelry making, casting is a process in which a liquid metal is delivered into a mold (usually by a crucible) that contains a negative impression (i.e., a three-dimensional negative image) of the intended shape. The metal is poured into the mold through a hollow channel called a sprue.
3-in-1 Sand & Water Activity Table. Your kids will be eager to get outside for playtime when they have this 3-in-1 activity table waiting for them.
Flitch beam. A flitch beam (or flitched beam) is a compound beam used in the construction of houses, decks, and other primarily wood-frame structures. Typically, the flitch beam is made up of a vertical steel plate sandwiched between two wood beams, the three layers being held together with bolts. In that common form it is sometimes referenced ...
Metalworking is the process of shaping and reshaping metals in order to create useful objects, parts, assemblies, and large scale structures. As a term, it covers a wide and diverse range of processes, skills, and tools for producing objects on every scale: from huge ships, buildings, and bridges, down to precise engine parts and delicate ...
Oxygen, nitrogen or air is fed through the same nozzle from which the laser beam exits. The metal is heated and burnt by the laser beam, cutting the metal sheet. [20] The quality of the edge can be mirror smooth and a precision of around 0.1 mm (0.0039 in) can be obtained. Cutting speeds on thin 1.2 mm (0.047 in) sheet can be as high as 25 m ...
Die shoes (holders) – the set of flat, parallel plates that serve as the foundation for mounting die components. [4] Guide pins (pillars) – together with guide bushings, the pins align the die shoes precisely during each press stroke. [4] Die set (plates). [5] Placement can be inverted depending on the operation, such as use of a knock-out: [6]
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