What are the names of 3 die casting surface defects?

能否说出3种压铸件表面缺陷？

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In order to improve the abrasion-resistant on the casting surface, this paper has studied surface alloy-reinforced composites.

为了提高铸件表面的耐磨性，本文研究了合金增强表面耐磨复合材料。

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Casting surface quality which is determined by casting parameters, affects the performance of mechanics and electrical conductivity.

铸件的表面质量影响着铸件的力学性能和导电性能，而表面质量与拉铸工艺参数有关。

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The burgeoning commercial space sector is also casting its gaze towards Earth's only natural satellite with companies considering everything from mining the lunar surface to building extraterrestrial resorts on it.

CNN: Who owns the moon? It's 'complicated,' say experts