导航单元是空投系统能够精确的将物资投送到指定地点，并安全实施雀降的重要保证。
Navigation unit is the guarantee that Airdrop system can deliver supplies to the designed place accurately and implement landing safely.
导航单元是空投系统能够精确的将物资投送到指定地点，并安全实施雀降的重要保证。
Navigation unit is the guarantee that Airdrop system can deliver supplies to the designed place accurately and implement landing safely.
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