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- GB 9123.12-1988 PN2.0MPa(20bar)凸面钢制管法兰盖
- GB 9123.12-1988
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- GB 9123.1-1988 PN0.25MPa(2.5bar)平面钢制管法兰盖
- GB 9123.1-1988
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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 9121.4-1988 PN2.5MPa(25bar)凸面平焊环松套板式钢制管法兰
- GB 9121.4-1988
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- GB 9120.6-1988 PN4.0MPa(40bar)榫槽面对焊环松套板式钢制管法兰
- GB 9120.6-1988
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- GB 9120.5-1988 PN2.5MPa(25bar)榫槽面对焊环松套板式钢制管法兰
- GB 9120.5-1988
-
- 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 9119.9-1988 PN2.5MPa(25bar)凸面板式平焊钢制管法兰
- GB 9119.9-1988
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- GB 9119.8-1988 PN1.6MPa(16bar)凸面板式平焊钢制管法兰
- GB 9119.8-1988