Concrete. Ultrasonic method for determining cold resistence
Бетоны. Ультразвуковой метод определения морозостойкости. |
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PB 03-445-02Safety rules on the operation of industrial … |
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Gosnadzor 35941Operational Documentation for Oil Wells on … |
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GOST 12.1.020-79SSBT. Occupational Safety Standards System. … |