Especially. the firing logie of the small disturb - ante with the ground test.
特别地提出了地面试验存在小扰动情况下的点火逻辑问题。
The companies plan to have a ground-based demonstrator engine prototyped and firing by 2020 and a further prototype flying on a test aircraft by 2025.
两家公司计划先建造用于地面试验的原型机，并在2020年之前点火测试，随后在2025年以前完成原型机试飞。
The companies plan to have a ground-based demonstrator engine prototyped and firing by 2020 and a further prototype flying on a test aircraft by 2025.
两家公司计划先建造用于地面试验的原型机，并在2020年之前点火测试，随后在2025年以前完成原型机试飞。
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