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- GB 9123.33-1988 PN10.0MPa(100bar)环连接面钢制管法兰盖
- GB 9123.33-1988
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- GB 9123.32-1988 PN5.0MPa(50bar)环连接面钢制管法兰盖
- GB 9123.32-1988
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- GB 9123.3-1988 PN1.0MPa(10bar)平面钢制管法兰盖
- GB 9123.3-1988
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- GB 9123.30-1988 PN25.0MPa(250bar)榫槽面钢制管法兰盖
- GB 9123.30-1988
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- GB 9123.29-1988 PN15.0MPa(150bar)榫槽面钢制管法兰盖
- GB 9123.29-1988
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- GB 9123.28-1988 PN10.0MPa(100bar)榫槽面钢制管法兰盖
- GB 9123.28-1988
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- GB 9123.27-1988 PN5.0MPa(50bar)榫槽面钢制管法兰盖
- GB 9123.27-1988
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- GB 9123.26-1988 PN4.0MPa(40bar)榫槽面钢制管法兰盖
- GB 9123.26-1988
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- GB 9123.25-1988 PN2.5MPa(25bar)榫槽面钢制管法兰盖
- GB 9123.25-1988
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- GB 9123.24-1988 PN1.6MPa(16bar)榫槽面钢制管法兰盖
- GB 9123.24-1988