20是一款可规避雷达的喷气式飞机，拥有与五角大楼的隐形飞机F - 22“猛禽”一样的标志型双v型垂直尾翼。
It is the J-20, a radar-evading jet fighter that has the same two angled tailfins that are the trademark of the Pentagon's own stealth fighter, the F-22 Raptor.
舵叶为半平衡式双板流线型结构，可分别向左右回转350舵角。
The rudder blade is semi-balance, double plate, stream-line type. Able to turn to 350 rudder Angle at port and starboard side.
另外用代数多项式和双正弦级数组成的解来满足角点条件。
Moreover, the solution composed by algebraic polynomial with double sine series is used to satisfy the corner conditions.
利用辛变换条件得到了一些新的切比雪夫多项式公式、三角恒等式和双曲恒等式。
In this paper by using the symplectic transformation condition, some new formulas including Chebyshev Polynomial, trigonometric identity, hyperbolic identity were obtained.
针对双圆锥扫描式红外地平仪因无刷直流扫描电机转速不均匀造成的姿态角测量误差进行了研究。
Attitude measurement errors of the double cone scanning infrared earth sensor caused by brushless DC motor speed asymmetry was researched.
四角切向燃烧和墙式对冲燃烧方式都有此问题，而W火焰双拱燃烧锅炉则更严重，值得关注。
This problem had occurred under corner tangential firing and wall opposed firing, and it became even more serious under W-shaped flame double-arch firing.
两位置静对准试验对准精度为20角秒，双轴摇摆和断续式双轴摇摆两位置晃动对准试验的对准精度达到30角秒。
Static alignment accuracy of two-position is 20 seconds, dynamic alignment accuracy of two-axis rolling and intermittent rolling is 30 seconds.
两位置静对准试验对准精度为20角秒，双轴摇摆和断续式双轴摇摆两位置晃动对准试验的对准精度达到30角秒。
Static alignment accuracy of two-position is 20 seconds, dynamic alignment accuracy of two-axis rolling and intermittent rolling is 30 seconds.
应用推荐