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ISO 2950:1974
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ISO 2950:1974 Brown coals and lignites -- Classification by types on the basis of total moisture content and tar yield
standard by International Organization for Standardization, 02/01/1974
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Brown coals are classified in this International Standard according to the following properties: total moisture content calculated on the ash-free basis; tar hiels calculated on the dry, ash-free basis. In tables class numbers, group number and code numbers of brown coal types are given.