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中国は5,000メートルの天井のある小さなマルチローターUAVを開発しています
中国ヘリコプター研究開発研究所（CHRDI）は、中国は最大5,000メートルまで登ることができる小型のマルチローター無人航空機（UAV）を開発しました。
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.