The technology of microcapsule was very important in the application of carbon copying paper.
揭示了微胶囊技术在无碳复写纸应用中的重要作用.
I spent the whole afternoon ( in ) copying my term paper.
我花了一下午的时间抄写学期论文.
This paper describes the design method of the swinging master as the attachment in a camshaft copying lathe.
介绍了凸轮轴车床摆动靠模的设计方法。
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