CNIS GB/T 12469-90 Quality assurance of welding--Requirement for fusion welding joint of steel and classification for imperfection. Формат поставки-PDF. Язык стандарта-Английский
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CNIS GB/T 12469-90 Quality assurance of welding--Requirement for fusion welding joint of steel and classification for imperfection
Язык:
Английский
Формат поставки:
PDF
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