Clouds of stars and glowing gas, with patches of darkening dust, mark the slow-changing spiral patterns of the Galaxy disk. 点缀着暗淡尘埃的团团恒星和发光星云,标记着银河系缓慢变化的旋涡外形。
It remains in the spiral category because of the flatness of the main disk of stars as opposed to the more spherically rotund ( or ellipsoidal) class of galaxies called "ellipticals". 它之所以属于螺旋星系范畴,是因为相对于那些更趋近于球体(或椭球)的星系来说,它的主要部分更平。
Development and Evaluation of a Spiral Disk Column System for High-speed Counter-current Chromatography 螺旋槽圆盘柱逆流色谱分离系统的研制及其应用评价
Application of spiral disk column in high-speed counter-current chromatography for peptide and protein separation 螺旋槽圆盘柱高速逆流色谱及其在多肽和蛋白分离中的应用
The spiral case disk shaped drain valve joystick fracture repair of Three Gorges Hydropower Station 三峡电站蜗壳盘形排水阀操作杆断口修复
They go around in the plane of the blackboard, say, and so this matter cannot fall radially in but it will fall in and spiral in and forms what we call an accretion disk around the neutron star. 平面内绕行,这个质量不是,呈放射状减小,而是,呈螺旋形减小,我们称之为中子星,周围的吸积盘,这个叫做吸收星。
A Note on The Asymptotic Density-Potential Relation of The Spiral Galaxy With Finite Disk Thickness 关于有限厚度旋涡星系中密度-引力势渐近关系的一个注记
The formation process of galactic shock wave is studied responding to an applied perturbed spiral gravitational field within initial axisymmetric gaseous disk, and the velocity and gas density distribution with the properties of galactic shock wave are obtained. 研究了在外加扰动螺旋引力场的作用下,轴对称气体盘中星系激波的形成过程。得到了星系激波的运动和密度分布特征。
The initial uniform magnetic field will wind into the spiral structures in the galactic disk, in which the magnetic field and the interstellar gas are frozen together. 初始均匀的磁场将缠卷而在星系盘中形成螺旋形的结构,其中磁场和星际气体是冻结在一起的。
Abstract In the forming technique of cylindrical spiral curved surfaces, the contour of workpiece is virtually the result that disk shaped milling tools feed into the workpiece and move around its axis. 在圆柱螺旋曲面的盘形铣刀成形铣削加工工艺中,工件上的螺旋曲面实质上就是盘形铣刀切削刃回转面螺旋进给运动所形成的包络。
The Application Value of Spiral CT Spinal Cord and Inter vertebral Disk 3D Imaging in Vertebral Trauma 螺旋CT脊髓及椎间盘三维成像在脊柱损伤中的应用价值
Study on sensitivity of piezo spiral transducer Acme Disk 压电盘簧换能器灵敏度研究
Spiral gear drive is the main drive mode of disk type separators. 碟式分离机螺旋齿轮传动为该类型机的主要传动方式。
The characteristic of the emission caused in the special spiral magnetic field of hydromagnetic accretion disk is discussed mainly using the formula of curvature radiation. 并着重用曲率辐射公式讨论了在磁流体吸积盘的特殊螺旋强磁场中的辐射特点。
The seal structure of the spiral shaft end for feeding of the rotary flashing dryers and its leak causes were analyzed, the original disk seal was retrofitted to be labyrinth seal and gas combination seal for operation under rough working conditions. 分析了旋转闪蒸干燥机喂料螺旋主轴轴端密封结构及其漏料原因,将原盘根密封结构改为迷宫密封和气体组合式密封,保证该干燥机在恶劣的工况条件下能正常运行。