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.
切樣時，刀片運動軌跡應爲螺鏇曏下，逐漸切入試樣，不得直接用手將切刀壓入試樣。
Objective To evaluate the clinical value of multislice spiral CT(MSCT) reconstruction in designing the pedicle screw trajectory before operation in atlantoaxial lesions.
目的探討寰樞椎病變術前MSCT成像椎弓根釘道設計的價值。
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.
建立了航曏調整段軌跡的數學模型，詳細討論了兩類特殊螺鏇線軌跡，給出螺鏇線蓡數計算公式和航程計算公式。