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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 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
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- GB 9119.7-1988 PN1.0MPa(10bar)凸面板式平焊钢制管法兰
- GB 9119.7-1988
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- GB 9119.6-1988 PN0.6MPa(6bar)凸面板式平焊钢制管法兰
- GB 9119.6-1988
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- GB 9119.5-1988 PN0.25MPa(2.5bar)凸面板式平焊钢制管法兰
- GB 9119.5-1988
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- GB 9119.4-1988 PN1.6MPa(16bar)平面板式平焊钢制管法兰
- GB 9119.4-1988
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- GB 9119.7-1988 PN1.0MPa(10bar)平面板式平焊钢制管法兰
- GB 9119.7-1988
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- GB 9119.2-1988 PN0.6MPa(6bar)平面板式平焊钢制管法兰
- GB 9119.2-1988
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- GB 9116.24-1988 PN15.0MPa(150bar)环连接面带颈平焊钢制管法兰
- GB 9116.24-1988