CNIS GB/T 9114.3-88 Hubbed screwed steel pipe flanges with raised face for PN 2.5MP (25 bar). Формат поставки-PDF. Язык стандарта-Английский
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CNIS GB/T 9114.3-88 Hubbed screwed steel pipe flanges with raised face for PN 2.5MP (25 bar)
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