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China unveils drone-mounted quantum device for submarine detection in South China Sea
Chinese scientists' breakthrough in magnetic detection technology could give China the edge in submarine warfare amid Sino-US ...
Digital Camera World40 分钟
Insta360 X5 v Insta360 X4 – it's the best, sure, but is it worth the upgrade?
The new Insta360 X5 is the new king of compact 360-degree cameras, but is it worth the upgrade from the X4 (or even the X3?) ...