Arithmancy class at Hogwarts is taught by Professor Vector. In her class, students are expected to write essays and to create and be able to understand complicated number charts (PA12).

在霍格沃兹魔法学校，数字占卜术由维克多教授任教。她要求她的学生在课堂上写论文，去创造，能够完全明白数字图表。（PA12）

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Project Outline: This project is to use PA12 as the main raw material, which is blended and modified, to produce automobile intake pipe.

项目建设背景：采用以PA12为主要原材料，进行共混改性，生产汽车进气管。

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