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The number is in the following format: x.yyzz(zz) Where x is the material type (only 1 is specified so far), yy is the steel group number (specified in EN10027-2) and zz(zz) is a sequential number designated by the certifying body, the number in brackets being unused but reserved for later use. The steel groups are indicated below:
1950 : Publication of JIS commenced. 1951 : Drafting of JIS began. 1952 : The Head Office moved to Ginza Kobiki-cho, Chūō-ku, Tokyo. 1958 : The first National Meeting of Standardization was held. 1963 : The construction of JSA building was completed in Akasaka, Minato-ku, Tokyo.
JIS X 0221-1:2001 – Japanese national standard which corresponds to ISO 10646; JIS X 0401:1973 – Todofuken (prefecture) identification code; JIS X 0402:2003 – Identification code for cities, towns and villages; JIS X 0405:1994 – Commodity classification code; JIS X 0408:2004 – Identification code for universities and colleges
The ABEC scale is designed to provide bearing manufacturers dimensional specifications that meet the standards of precision bearings in a specified class. The scale is also used by manufacturers who produce equipment that require bearings must also know the dimensional tolerances to design parts that will accommodate a bearing.
The Japanese Industrial Standards Committee (日本産業標準調査会, Nihon Sangyō Hyōjun Chōsakai, JISC) is a standards organization and is the International Organization for Standardization (ISO) member body for Japan.
Pressure due to direct impact of a strong breeze (~28 mph or 45 km/h) [27] [28] [31] 120 Pa Pressure from the weight of a U.S. quarter lying flat [32] [33] 133 Pa 1 torr ≈ 1 mmHg [34] ±200 Pa ~140 dB: Threshold of pain pressure level for sound where prolonged exposure may lead to hearing loss [citation needed] ±300 Pa ±0.043 psi
Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...
Since research showed that individual Japanese did not intend to actually use the metric units when given other options, however, sale and verification of devices marked with non-metric units (such as rulers and tape measures noting shaku and sun) were criminalised after 1961. [11] Some use of the traditional units continues.