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The prestress dry grinding which combines with prestress grinding and surface strengthening is an innovative approach to substitute conventional grinding process. The residual stress and the thickness of strengthened layer have an important effect on surface performance of workpiece. In order to analyze the effect mechanisms of prestress on residual stress and thickness of strengthened layer, experiment...
The secure shutdown time of submarine oil pipeline must be determined before pipeline designed and put into production. Considering the actual operation situations, physical model of heat transfer was established for submarine oil pipelines, and experimental equipment of submarine oil pipelines with shutdown and heat transfer was designed based on the similarity theory. It can simulate the shutdown...
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