-
- GB 9117.5-1988 PN5.0MPa(50bar)凹凸面带颈承插焊钢制管法兰
- GB9117.5-1988
-
- GB 9123.22-1988 PN15.0MPa(150bar)凹凸面钢制管法兰盖
- GB9123.22-1988
-
- GB 9123.2-1988 PN0.6MPa(6bar)平面钢制管法兰盖
- GB9123.2-1988
-
- GB 9123.16-1988 PN25.0MPa(250bar)凸面钢制管法兰盖
- GB9123.16-1988
-
- GB 9123.14-1988 PN10.0MPa(100bar)凸面钢制管法兰盖
- GB9123.14-1988
-
- GB 9120.6-1988 PN4.0MPa(40bar)榫槽面对焊环松套板式钢制管法兰
- GB9120.6-1988
-
- GB 9123.7-1988 PN0.6MPa(6bar)凸面钢制管法兰盖
- GB9123.7-1988
-
- GB 9123.27-1988 PN5.0MPa(50bar)榫槽面钢制管法兰盖
- GB9123.27-1988
-
- GB 9116.18-1988 PN4.0MPa(40bar)榫槽面带颈平焊钢制管法兰
- GB9116.18-1988
-
- GB 9115.5-1988 PN2.0MPa(20bar)平面对焊钢制管法兰
- GB9115.5-1988
