GOST R 57179-2016
Thermite welding of rails. Methods of testing and quality control
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GOST R 57179-2016
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GOST R 57179-2016
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GOSTR
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GOST R 57179-2016
GOST R 57179-2016 history
1970
GOST R 57179-2016
Thermite welding of rails. Methods of testing and quality control
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