| 1. | If, however, the blades are not tilted, the helicopter can be made to hover motionless in the air .
然而，如果桨叶不倾斜，就能使直升飞机在空中悬停不动。 |
| 2. | The electric fan blades whirled in the hot room
电扇的桨叶在闷热的房内旋转著。 |
| 3. | General specification for helicopter blade lead - lag damper
直升机桨叶摆振阻尼器通用规范 |
| 4. | Frequency tests of helicopter rotating rotor blade
直升机旋翼旋转状态下桨叶固有频率的测试 |
| 5. | Both tail rotor blades were severed
尾桨的两片桨叶均折断。 |
| 6. | Requirements of packaging , transportation and storage for helicopter blade
直升机桨叶包装运输和贮存要求 |
| 7. | Blade profile drag coefficient
桨叶剖面阻力系数 |
| 8. | Calculation of manufacturing values of the curve surface of blades of the propeller
螺旋桨桨叶叶面加工过程中加工量的计算 |
| 9. | Experimental study on mixing performance of the twin - shaft paddle rotating mixer
翻转卸料式双轴桨叶混合机混合性能试验研究 |
| 10. | Design method for controllable pitch propellers by employing methodical series test diagrams
可调螺距螺旋桨桨叶图谱设计计算方法 |
