Based on the researches of shell and co - axial rotors , the aerodynamic characteristics of the helicopter in hovering are studied by means of the combination of momentum theory and blade element theory in this paper . an aerodynamic mathematical modeling has been established 在以上研究的基础上根据碟形无人直升机的设计要求，选择了该直升机的结构型式和总体参数，并对其性能进行了计算。
This thesis gaved a detail account to the main part . for example : the design of the cylinder and the piston rod ; the time calculate of the valve ; the design of the disc spring and how to use it 根据断路器的要求进行了弹簧液压机构的主要液压元件的设计：集成式工作缸和变截面活塞杆结构设计；电磁阀、控制阀系统结构设计及动作时间的近似计算；储能碟形弹簧的结构设计、应力计算及选用方法。
Bending around the edges of her vision she was conscious of curtains being swished closed , stone faces bathed by the grey light of televisions , broken roof tiles , satellite dishes , bay windows , the whole higgledy - piggledy collection of guttering and skylights 在视野的尽头她意识到被嗖嗖拉紧的窗帘，沐浴在电视发出的灰白的光线下的砌石护面，破裂的屋顶，碟形卫星天线，凸窗，整一堆排水材料和天窗。
The design of configuration and other primary structures of the helicopter have been finished . in order to analysis the stability and control of the helicopter , a flight mechanical modeling has been founded based on a single - rotor helicopter 本文以常规单旋翼带尾桨的直升机配平和操稳计算方法为基础，建立了带涵道共轴式直升机飞行动力学模型，对碟形无人直升机进行了配平和操纵性和稳定性分析计算。
The maincharacter of pollen assemblages in the site was the peaks of typha in the final stage of the liangzhu culture and dominant proportion of typha in the maqiao culture , denoting large water areas around the site 该遗址孢粉记录表明，良渚文化晚期和马桥期出现大量的香蒲，遗址周围池塘沼泽面积较大。 2 、太湖流域新石器时期文化遗址的兴衰与地势、气候、海平面的变化以及太湖碟形湖盆体系的发育密切相关。
China spring factory , founded in 1937 , is the largest spring manufacturer in china . it mainly produces automotive suspension spring , engine valve spring , stabilizer bar , die spring , shaped spring , dise spring , clutch spring 中国弹簧厂始建于1937年，是中国规模最大的弹簧制造企业，主要生产汽车悬架弹簧、发动机气门弹簧、稳定杆以及模具弹簧、异型弹簧、碟形弹簧、离合器弹簧、超大型弹簧、各类弹性冲压件和其他精密螺旋弹簧。
Utilize overseas high - quality dished dual metallic piece as temperature gathering element , install thermal protector at the temperature sensitive position of water tank , collect the temperature changes of water tank on real - time basis and take the action of safe protection to water tank of car 利用国外优质碟形双金属片作温度采样元件，将热保护器安装在水箱温度敏感部位，动态采集水箱的温度变化，对水箱起到安全防护作用。
In order to improve the friction between the outer diameter of dishing ring and cone , and prevent any contaminant , such as slurry and ect . from coming , the outside diameter may be curved upward . the length and open of the curved may be determined by the analogue to the actual condition 为改善碟形圈外径与牙轮的摩擦工况，更好地防止泥浆等有害物质的侵入，可将其外径略向上弯曲，弯边的长度及开口数可由实际工况的模拟来确定。
Utilize overseas high - quality dished dual metallic piece as temperature gathering element , make thermal protector and electronagnetic clutch of compressor in series , control disconnection and connection according to the detected temperature change of the body of the compressor and take the action of safe protection 利用国外优质碟形双金属片作温度采样元件，将温控器与汽车压缩机机体温度的改变来控制离合器的断开与接通，起到安全防护作用。
Detailed demonstrations and designs for each module ' s scheme are given , including diameter and length contacting module , mass contacting module , dishing depth contacting module , photoelectric microscope non - contacting module , verticality contacting module and data acquisition module . after design , strict accuracy analyses for each measuring module are given 该文对各测量模块的测量方案进行了详细的论证和设计，包括直径高度接触式测量模块、质量接触式测量模块、碟形深度接触式测量模块、倒角肩宽碟宽非接触式测量模块、垂直度接触式测量模块以及数据采集模块的设计。
