石油、石化及相关工业用钢制截止阀和升降式止回阀 旁通装置接管的公称尺寸
截止阀的公称尺寸 DN |
旁通装置接管公称尺寸 DN |
50~100 |
15 |
125~200 |
20 |
250~300 |
25 |
350~400 |
40 |
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