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However, the term gauge, abbreviated G or ga, typically refers to the Birmingham gauge for hypodermic needles. [ 1 ] The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 millimeter, making the relationship: 1 mm = 3 Fr.
Generally, the system of gauge-and-inches is used: In gauge notation, jewelry less than 1 ⁄ 2 ″ thick is typically measured in a system originally devised for measuring wire thickness. A gauge number denotes a thickness on a standardized scale which, for most purposes, starts at 20g (0.812 mm thick— often used for the posts for nose studs ...
Sulitjelma Line converted from 750 mm (2 ft 5 + 1 ⁄ 2 in) to dual gauge with 1,067 mm (3 ft 6 in) and when later closed was converted to a road. 1,435 mm ( 4 ft 8 + 1 ⁄ 2 in ) 1,067 mm ( 3 ft 6 in )
A better method for measuring strength is to use a slit gauge, Figure 2, with which the thickness of the mainspring is measured directly. This gauge uses a scale of sizes running from 21 (0.05 mm) to 5/0 (0.30 mm). Scales used in watchmaking generally do not use negative numbers. Instead, after size 0 there is 2/0 or 00, 3/0 or 000, and so on.
Habutai—5 to 16 mm; Chiffon—6 to 8 mm (can be made in double thickness, i.e. 12 to 16 mm) Crepe de Chine—12 to 16 mm; Gauze—3 to 5 mm; Raw silk—35 to 40 mm (heavier silks appear more "wooly") Organza—4 to 6 mm; Charmeuse—12 to 30 mm
A standard wire gauge. The British Standard Wire Gauge, often referred to as the Standard Wire Gauge or simply SWG, is a unit used to denote wire gauge (size) as defined by BS 3737:1964, a standard that has since been withdrawn. It is also known as the Imperial Wire Gauge or British Standard Gauge. Although its use has significantly declined ...
The Birmingham gauge ranges from 5/0 or 00000, the lowest gauge number corresponding to the largest size of 0.500 inches (12.7 mm), to 36, the highest gauge number corresponding to the smallest size of 0.004 inches (0.10 mm). The increments between gauge sizes are not linear and vary. [2]
Wire sized 1 AWG is referred to as "one gauge" or "No. 1" wire; similarly, thinner sizes are pronounced "x gauge" or "No. x" wire, where x is the positive-integer AWG number. Consecutive AWG wire sizes thicker than No. 1 wire are designated by the number of zeros: No. 0, often written 1/0 and referred to as "one-aught" or "single-aught" wire
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