Helium balloon lifts up to two tons of building material over Tibet's mountains
- Tibet 近 90 天出现 21 次
- 上一次：22 天前 · Glacial flood death toll surpasses 900 in Nepal and Tibet
发生了什么
China carried out its first test of a two-ton-class tethered balloon in Tibet on Monday at an altitude of about 13,000 feet. The roughly 80-foot helium balloon lifts building material over rugged high...
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