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Website URL:
http://baike.so.com/doc/5348881-5584335.html
Category:
Chemistry Science Technology
GPS,GPS是英文Global Positioning System(全球定位系统)的简称。GPS起始于1958年美国军方的一个项目,1964年投入使用。20世纪70年代,美国陆海空三军 ...
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