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Two principal techniques are used to produce seed beads: the wound method and the drawn method. The wound method is the more-traditional technique, is more time-consuming, and is no longer used in modern bead production: in this technique, a chunk of glass known in glassmaking as a gather and composed mainly of silica is heated on an iron bar until molten.
Five sen coins were re-established in 1916 when the 1897 monetary law was revised. Under Imperial ordinance 35 of March 30, 1916 a central hole of 4.2mm was specified for the coppernickel coins. [29] This measure reduced production costs, avoided any future 20 sen coin confusion, and was a deterrent to counterfeiters.
Ball chain or bead chain is a type of chain consisting of small sheet metal balls connected via short lengths of wire. [1] The balls are hollow and have two small antipodal holes. These holes accept a short length of wire deformed on the end like a rivet so that the end is bound inside the ball. The wire is then connected to another ball using ...
Fuse beads are sold in a variety of sizes, but most have diameter 5 mm, and 5 mm Hama beads are compatible with 5 mm Perler beads. [1] Hamabeads come in three sizes: mini (2 mm), midi (5 mm) and maxi (10 mm). [7] Perler beads come in two sizes called classic (5 mm) and biggie (10 mm). Pyssla beads (by IKEA) only come in one size (5 mm).
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Through-hole technology uses holes drilled through the printed circuit board (PCB) for mounting the components. The component has leads that are soldered to pads on the PCB to electrically and mechanically connect them to the PCB. Three 14-pin (DIP14) plastic dual in-line packages containing IC chips.