The big sheets of clay then had to be carefully shaped inside of the plaster mould and cut even around the edges.

大木板上的粘土需要很小心地黏在石膏模具里面，然后切掉在边缘的多余部分。

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After achieving the desired shape, I cast my model in plaster to create a concave mould.

在获得我想要的形状之后，我把我的模型上了石膏，从而创造一个凹面的模具。

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Thermoresistant saggers containing silicon carbide and granular filler were produced through slip casting in plaster mould.

用石膏模浇注法生产出了含碳化硅和粒状填料的耐热匣钵。

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Often, in the case of jaw or face plates, the only way to make the mould is to take a plaster cast of the outside of the patient's head, says Dr Richards.

ECONOMIST: MONITOR