垂直度-条件是表面，轴，或线，这是90度的基准平面或基准轴。
Perpendicularity - is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis.
对涡轴发动机动力涡轮转子测扭基准轴的不平衡量进行了研究，提出了一种通过高速动平衡试验估算出测扭基准轴不平衡量的试验方法。
The torque tube unbalance of turboshaft power turbine rotor is investigated and a test method for estimating the unbalance is introduced with high speed dynamic balance test.
然后用累加弦长作为虚拟的插补基准轴，提出了一种基于虚拟基准轴的插补新算法。
The fitted curve is smooth and continuous. The accumulated chord length is used as virtual interpolation datum axis.
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