发热性缩孔防止粉

[机] exothermic antipiping powder

fā rè xìng suō kǒng fáng zhǐ fěn ㄈㄚ ㄖㄜˋ ㄒㄧㄥˋ ㄙㄨㄛ ㄎㄨㄥˇ ㄈㄤˊ ㄓˇ ㄈㄣˇ