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Back then, screw threads and other dimensions were not standardized to the same extent that they are now.
Each manufacturer would develop its own proprietary "standards." Over time, this caused so much confusion and difficulty that it led to a gradual movement toward industry-wide (or at least nationwide) standardization. K.,, the British Cycle Engineer's Institute (CEI) was created to standardize dimensions for the industry. (Birmingham Small Arms) was an important bicycle and firearms maker in the early 20th century and was one of the companies which promulgated the BSC standards. Right through the 1990s, the bikes built at the mighty Nottingham Factory were made to Raleigh proprietary dimensions.
Contemporary bicycles have many parts made of aluminum (or "aluminium," if you prefer) for lightness, strength and corrosion resistance.
On 12/9/2003 at , a magnitude 4.5 (4.5 MB, 4.5 LG, Depth: 3.1 mi, Class: Light, Intensity: IV - V) earthquake occurred 129.0 miles away from the city center On 8/2/1974 at , a magnitude 4.9 (4.3 MB, 4.9 LG) earthquake occurred 256.3 miles away from Raleigh center On 11/22/1974 at , a magnitude 4.7 (4.7 MB) earthquake occurred 219.3 miles away from the city center On 7/27/1980 at , a magnitude 5.2 (5.1 MB, 4.7 MS, 5.0 UK, 5.2 UK, Class: Moderate, Intensity: VI - VII) earthquake occurred 335.9 miles away from the city center On 8/21/1992 at , a magnitude 4.4 (4.1 MB, 4.1 LG, 4.4 LG, Depth: 6.2 mi) earthquake occurred 209.1 miles away from Raleigh center On 10/21/1998 at , a magnitude 3.8 (3.8 LG, 3.3 LG, Depth: 8.3 mi, Class: Light, Intensity: II - III) earthquake occurred 109.1 miles away from the city center The number of natural disasters in Wake County (17) is greater than the US average (13). Religion Census: Religious Congregations & Membership Study. Congregations and Membership in the United States 2000.