这种完善的操纵机构，使他们能安全滑翔并进一步制造有动力装置的飞机。
This perfect control made their sliding safe and allowed them to proceed to the powered airplane .
凝汽器运行的热力性能对汽轮机机组运行和核动力装置的安全性与经济性有很多影响。
Its thermodynamic characteristic has a heavy impaction on the security and economy of a running turbine and the nuclear power installation.
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