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The name XNC format stands for Exchange NC format. As a strict subset, it is highly compatible with existing software. Its purpose is to address the current chaos of different subsets and incomplete NC files, and define a simple common standard. The XNC subset was defined by a consortium formed by Graphicode, Ucamco, KiCad and Pentalogix.
The format was devised by David Kehmeier at the Mentor Graphics Corporation. [1] The EMN File contains the PCB outline, the position of the parts, positions of holes and milling, keep out regions and keep in regions. The EMP file contains the outline and height of the parts.
The site also has a download section, which provides for end user download of the entire codeset or modifications to the codeset since the last download by the user. The download file can be formatted as an Excel, tab-delimited or CSV file. In addition, the Code is available via printed format in the Alphabetical Index Book and the Class Item Book.
The U.S. Census Bureau, Bureau of Labor Statistics, Internal Revenue Service and Social Security Administration utilize SIC codes in their reporting, although SIC codes are also used in academic and business sectors. The Bureau of Labor Statistics updates the codes every three years and uses SIC to report on work force, wages and pricing issues.
The Gerber format is an open, ASCII, vector format for printed circuit board (PCB) designs. [1] It is the de facto standard used by PCB industry software to describe the printed circuit board images: copper layers, solder mask, legend, drill data, etc. [2] [3] [4] The standard file extension is .GBR or .gbr [1] though other extensions like .GB, .geb or .gerber are also used.
The North American Industry Classification System or NAICS (/ n eɪ k s /) [1] is a classification of business establishments by type of economic activity (the process of production).
Qualification testing of welders for under-water welding. Diver-welders for hyperbaric wet welding ISO 15618-2: Qualification testing of welders for under-water welding. Diver-welders and welding operators for hyperbaric dry welding ISO 17635: Non-destructive testing of welds. General rules for metallic materials ISO 17660-1
Goods and services are divided into 5 different tax slabs for collection of tax: 0%, 5%, 12%, 18% and 28%. However, petroleum products, alcoholic beverages, and electricity are not taxed under GST and instead are taxed separately by the individual state governments, as per the previous tax system. [1]