spiral trajectory

基本解释

Cut samples, the blade should be spiral downward trajectory, gradually cut into the sample may not be directly pressed into the sample by hand cutter.
切样时，刀片运动轨迹应为螺旋向下，逐渐切入试样，不得直接用手将切刀压入试样。
Objective To evaluate the clinical value of multislice spiral CT(MSCT) reconstruction in designing the pedicle screw trajectory before operation in atlantoaxial lesions.
目的探讨寰枢椎病变术前MSCT成像椎弓根钉道设计的价值。
Two kind of three-dimensional spirals are used to describe the trajectory of the Heading Alignment Phase (HAP) and spiral parameters calculating formulas are deduced.
建立了航向调整段轨迹的数学模型，详细讨论了两类特殊螺旋线轨迹，给出螺旋线参数计算公式和航程计算公式。