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https://www.mechanicalengineerblog.com/2020/01/19/the-effect-of-welding-flame-heating-on-the-weld-structure-and-the-weld-heat-affected-zone/ | 20% | Daily | 2021-01-27 21:17 |
https://www.mechanicalengineerblog.com/2020/01/17/what-is-pipeline-definition/ | 20% | Daily | 2021-01-27 21:22 |