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初步鉴定的成就通过一系列的地面鉴定试验验证了发动机的寿命。这些试验模拟了发动机飞行工作条件,并提供了更接近于实际飞行的情况。每一鉴定系列都在两倍于当量飞行时间的情况下进
The achievements of the preliminary appraisal have verified the engine’s life through a series of ground appraisal tests. These tests simulate engine flight operating conditions and provide a closer look at actual flight conditions. Each qualification series is doubled with equivalent flight time