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全球军事动向
27 Aug 2024, 12:11
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蓝色起源展示了其BE-7引擎在真空舱进行测试的照片，这是一款双膨胀封闭式循环氢氧引擎，设计推力4.5吨，用于蓝色起源的月球登陆器，较小的MK1登陆器使用单台BE-7引擎，更大的MK-2使用三台该引擎。
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