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Steel flat welded flanges of vessels and apparatus. Design and dimensions
Document status: Replaced by GOST 28759.2-2022
Peat and products of its processing. Methods for determination of ash content
Document status: Active
Standard reference silver-silver chloride saturate electrode of second class
Document status: Active
Petroleum products. Determination of base number method potentiometric titration with perchloric acid
Document status: Active
