Wood rays of p. armand and p. prokoraiensis on tangential section both had two shapes that was uniserial wood ray and spindle wood ray.
华山松与前红松弦切面上的木射线均呈两种状态，即单列木射线和纺锤形木射线；
The state vector methd of cross-section and modal analysis methd are used to identify the support and modal parameters of the spindle unit of the single spindle longitudinal automatic lathe mod.
本文采用截面状态矢量法和模态参数识别方法识别出CM 1107单轴纵切自动车床主轴部件的支承参数和模态参数。
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