国际标准ISO2531—XXXX输水用球墨铸铁管、管件、—XXXX目录1适用范围……………………………………………………………………………………………….2引用标准……………………………………………………………………………………………….3定义…………………………………………………………………………………………………….4技术要求……………………………………………………………………………………………….………………………………………………………….…………………………………..………………………………………………………………………………….………………………………………………………………………….………………………………….………………………………………………………………………………………………….…………………………………………………………………………………………..……………………………………………………………………………………….……………………………………………………………………………………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..………………………………………………………………………………….………………………………………………………………………………….………………………………………………………………………………..……………………………………………………………………………………………………………………………………………………………………….………………………………………………………………..…………………………………………………………………………………..……………………………………………………………………………………..…………………………………………………………………………………………..5密封要求……………………………………………………………………………………………..………………………………………………………………………………………….………………………………………………………………………………………….……………………………………………………………………………………..………………………………………………………………………………..…………………………………………………………………………….6试验方法……………………………………………………………………………………………..…………………………………………………………………………………………..……………………………………………………………………………………..……………………………………………………………………………………..……………………………………………………………………………………..……………………………………………………………………………………….……………………………………………………………………………………..………………………………………………………………………………….………………………………………………………………………………….……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….…………………………………………………………………………….………………………………………………………………………………………………………7型式试验…………………
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