Methods: By reference to the right-handed coordinate system, the three-dimensional positions of the femoral and pelvic attachment of the muscles related to the hip joint were all measured.
方法：以股骨头、髋臼的中心为原点建立股骨及骨盆的右手正交坐标系，将髋关节周围起于骨盆的肌肉的股骨、骨盆附着点的三维坐标位置进行了测量定位。
Based on control equation of three dimensional elasticity in cylindrical coordinate system, the state equation is derived.
根据圆柱形坐标系的三维弹性力学控制方程，导出其状态方程。
The growth and development of upland rice root system were studied by three-dimensional coordinate container method.
采用自创的“三维坐标容器法”，研究了潮砂土、红壤土、水稻土对陆稻根系生长发育的影响。
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