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Messier 19 or M19 (also designated NGC 6273) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier on June 5, 1764 [ 6 ] and added to his catalogue of comet -like objects that same year.
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or simply SWG, is a unit used to denote wire gauge (size) as defined by BS 3737:1964, a standard that has since been withdrawn.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 ...
Tanzania in 2008 is proposed 1,000 mm (3 ft 3 + 3 ⁄ 8 in)/ 1,067 mm (3 ft 6 in) steel sleepers and 1,000 mm (3 ft 3 + 3 ⁄ 8 in)/ 1,435 mm (4 ft 8 + 1 ⁄ 2 in) concrete sleepers to suit gauge conversion. 1,000 mm (3 ft 3 + 3 ⁄ 8 in) 1,435 mm (4 ft 8 + 1 ⁄ 2 in) 1920 onward Thailand: From 1920, the standard gauge part of the Siam railway ...
The Messier catalogue is one of the most famous lists of astronomical objects, and many objects on the list are still referenced by their Messier numbers. [1] The catalogue includes most of the astronomical deep-sky objects that can be easily observed from Earth's Northern Hemisphere; many Messier objects are popular targets for amateur ...
Below is a comprehensive drill and tap size chart for all drills and taps: Inch, imperial, and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.
Using 32 mm (1.26 in) - 0 gauge - track, there is an extensive range of 16 mm to the foot scale [1:19] live-steam and other types of locomotives, rolling stock and accessories. Many of these models are dual gauge, and can be converted to run on 45 mm ( 1.772 in ) track ( gauge 1 ), and radio control is common.
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] At higher gauge numbers, the increment between the two ...
In addition to the descriptive steel grade naming system indicated above, within EN 10027-2 is defined a system for creating unique steel grade numbers. While less descriptive and intuitive than the grand names they are easier to tabulate and use in data processing applications.