The life of the Russian engine has been the object of the outside teasing, the main reason is that the life of the Russian engine is too short. For example, the basic repair period of AL-31F is 300 hours, the largest 900 hours. By the beginning of this ce

In a recent interview with the 95 rifle, 95 rifles and bullets of domestic academician Duo Yingxian chief designer of poor quality, especially the performance of propellant, the quality is not stable, a serious drag on the performance and reliability of t

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