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국제Space
[국제]Space helicopter to Mars withstands 90 degrees below zero and prepares for test flight
![[국제]Space helicopter to Mars withstands 90 degrees below zero and prepares for test flight](https://www.ytn.co.kr/img/comm/ytn_sns_default.jpg "[국제]Space helicopter to Mars withstands 90 degrees below zero and prepares for test flight")