双语例句
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Key type drill chuck, which is widely used in various minal and fixing enterprises, is a kind of drilltightening device.
扳手钻夹头是广泛用于各工矿企业，装修行业的钻头夹紧装置。
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The present research was aimed at establishing genetically engineering cell lines that overexpress the Cter minal fragment of human APP gene.
本研究旨在建立过表达人APP基因C-末端片段的遗传工程细胞系。