CNIS GB/T 12605-90 Methods of radiographic inspection and quality classification of circumferential fusion welded butt joints in steel pipes and tubes. Формат поставки-PDF. Язык стандарта-Английский
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CNIS GB/T 12605-90 Methods of radiographic inspection and quality classification of circumferential fusion welded butt joints in steel pipes and tubes
Язык:
Английский
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