Because of condenser caused by mediums, leakage occurred in the large-area welding between pipe connect of a C_3H_6 condenser tube sheet.

由于介质原因造成腐蚀，使一台丙烯冷凝器管板上大面积的管口焊缝失效发生泄漏。

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So it enlarges the application area of rough set theory and provides a new method for modeling in welding area, and has a large potential of wide application.

该方法拓展了粗糙集理论的应用领域，并为焊接建模提供了一种新方法，具有较大的应用潜力。

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Microstructure and properties of repaired welding area in large aluminum alloy ZL114A castings by MIG (Metal Inertia Gas) welding technology were studied.

研究了ZL114 A合金大型铸件熔化极气体保护焊(MIG)焊补区域的组织与性能。

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