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发表于 2018-10-2 10:07:28
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Components, such as shells,heads, nozzles, manways, reinforcing pads, flanges, tubesheets,flat cover plates, backing strips which remain in place, and attachments which are essential to the structu ra l i n te gr i ty o f th e ve s s e l wh e n we l d e d to pressure-retaining components, shall be treated as separat components.
理解的不对, backing strips 和attachments 是并列关系。 |
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