浇入

dāng jīn shǔ jiāo rù shí pào mò cái liào zhēng fā jīn shǔ qǔ dài qí wèi zhi

当金属浇入时，泡沫材料蒸发，金属取代其位置。

As the metal is poured, the foam vaporizes, and the metal takes its place.