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类型：纪录片 地区：美国 年份：2014

主演：内详  

导演：内详  

更新：2024-08-21 15:53:35

简介： In order to manufacture these sophisticated high-tech weapons and equipment, rare earth is a kind of metal that must be used. Without rare earth, the accuracy of these weapons will be greatly reduced, or even have no precision and accuracy at all... 详情