The Mask of Satdjehuty is thought to have belonged to a lady of the highest rank, c. 1500 BC.

Satdjehuty面罩被认为属于公元前1500年一位地位极高的女性

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By 3000 B. C. in Mesopotamia (present-day Iraq), and then soon after in Egypt, and by 1500 B. C. in China.

公元前3000年，美索不达米亚平原(现在的伊拉克)，不久之后在埃及，然后公元前1500年，在中国。

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In this paper, a design and manufacture of a power supply of high and stabilized voltage of d. C. of 400-1500 volt which is continuously modulated is presented.

本文介绍一种从400 ~ 150 0伏连续可调直流稳压电源的设计与制作，其设计思想可移植到其他高压稳压电源中。

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