Non-destructive testing. Welded joints. Ultrasonic methods
Контроль неразрушающий. Соединения сварные. Методы ультразвуковые |
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GOST 3242-79Welded joints. Quality control methods |
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GOST 21105-87Non-destructive testing. Magnetic powder method |
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GOST 23667-85Non-destructive testing. Ultrasonic flaw … |