The findings confirm an earlier observation by a team of astronomers, making a strong case that the Milky Way has two major spiral arms, a common structure for galaxies with bars.
此发现证实了一个天文学家小组先前获得的观察：银河系有两条主要的螺旋臂，是一个普通中心带有横条的星系结构。
The concrete structure surrounding spiral case of the Three Gorges power station's powerhouse becomes one of the most complicated structures of the powerhouse for its queer geometric figuration.
三峡电站厂房蜗壳外围混凝土结构由于其几何形态的奇异而成为三峡电站厂房结构中最复杂的结构之一。
Longtan hydropower station is large in big structure size of spiral case, high in installation accuracy and welding requirement, poor in welding environment, and short in construction period.
龙滩水电站机组蜗壳结构尺寸大，安装精度和焊接要求高，焊接环境差，工期要求短。
The penstock and spiral case with elastic layer are defined as a engineering measure of having flexible layer material surrounding it to meet the needs of bearing loads in structure.
在水电站压力引水钢管或钢蜗壳外表敷设软垫层材料以满足结构受力要求的工程措施称之为垫层管或垫层蜗壳。
The structure of preloading filling spiral case is becoming larger and more complex correspondingly, and it is widely used in large hydropower house because of its reliability.
在已建的大型电站中，充水保压蜗壳结构以其独特的结构优势和可靠性得到了广泛的应用。
The structure of preloading filling spiral case is becoming larger and more complex correspondingly, and it is widely used in large hydropower house because of its reliability.
在已建的大型电站中，充水保压蜗壳结构以其独特的结构优势和可靠性得到了广泛的应用。
应用推荐