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) Order 61 Of December 15, 1997Regarding the “ratification of the Statute Regarding the Procedure for the Registration of the Commencement of Construction, Testing and the Issue of Authorisation for the Operation of Fully Constructed Communications Sites” |
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