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- GB 9123.19-1988 PN4.0MPa(40bar)凹凸面钢制管法兰盖
- GB 9123.19-1988
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- GB 9123.18-1988 PN2.5MPa(25bar)凹凸面钢制管法兰盖
- GB 9123.18-1988
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- GB 9123.17-1988 PN1.6MPa(16bar)凹凸面钢制管法兰盖
- GB 9123.17-1988
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- GB 9121.6-1988 PN2.5MPa(25bar)凹凸面平焊环松套板式钢制管法兰
- GB 9121.6-1988
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- GB 9121.5-1988 PN1.6MPA(16bar)凹凸面平焊环松套板式钢制管法兰
- GB 9121.5-1988
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- GB 9120.4-1988 PN4.0MPa(40bar)凹凸面对焊环松套板式钢制管法兰
- GB 9120.4-1988
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- GB 9116.15-1988 PN10.0MPa(100bar)凹凸面带颈平焊钢制管法兰
- GB 9116.15-1988
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- GB 9116.14-1988 PN5.0MPa(50bar)凹凸面带颈平焊钢制管法兰
- GB 9116.14-1988
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- GB 9116.13-1988 PN4.0MPa(40bar)凹凸面带颈平焊钢制管法兰
- GB 9116.13-1988
-
- GB 9116.12-1988 PN2.5MPa(25bar)凹凸面带颈平焊钢制管法兰
- GB 9116.12-1988