The blowhole is one of the most common casting defectives in the casting process, the type of this defective is so much, and its producing mechanism is various.

• 气孔是铸件在铸造过程中最常见的缺陷之一，该缺陷种类繁多，产生的机理各不相同，属于铸造界的一个技术难题，颇具研究价值。