Objective To measure the take voltage and exposure time of diagnostic X-ray machine.

目的检测诊断X射线机的管电压和曝光时间。

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There are different opinions and controversies about the first importation of X-ray diagnostic machine, which was imported into China.

关于中国第一台X光诊断机引进的时间，众说纷纭，莫衷一是。

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