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GOST (ГОСТ) 7025-91Ceramic and silicate bricks and blocks. Methods for water absorption and density determination and cold resistance testingКирпич и камни керамические и силикатные. Методы определения водопоглощения, плотности и контроля морозостойкости. |
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MISC (ПР) 197-FZ of 123001Law 197-Fz of 123001-The Labor Code of the Russian Federation |
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