We have rectangular coordinates, we have cylindrical coordinates and we have spherical coordinates. 我们有直角坐标系,有柱坐标系和球坐标系。
In this paper, the wave propagation characteristics of infinite cylindrical shells with circumferential surface crack are investigated. 研究了振动波在含有环向表面裂纹的无限长圆柱壳中的传播特性。
This cylindrical vessel is designed and made by ourselves. 这种圆柱形容器是我们自行设计和制造的。
The property of bending elasticity deformation for prestressed cylindrical helical spring was studied. 研究了预应力圆柱螺旋弹簧的弯曲弹性变形特性。