通过比较心房扑动（简称房扑）成功消融前后右心房峡部时间间期，分析峡部时间间期的延长程度对峡部完全性双向阻滞的预测价值。
The purpose of this study was to determine whether the extent of prolongation of the transisthmus interval after ablation predicts complete bidirectional block.
通过对浮环减薄前后实验结果的对比分析，研究了浮环厚度变化对浮环轴承涡动及稳定性的影响，并给出了三维谱图、涡动比与转速图、典型分岔图。
Based on two experiments on floating ring bearing before and after floating ring thickness reduction, the effect of thickness variation of floating ring on whirl and stability was studied.
因此，迫使退圈和脱圈沉降片的 枢转运动随动织针（4）的前后线性运动。
Consequently, the pivoting movement of the holding-down and knock-over sinker (5) is forced to follow the back-and-forth linear movement of the knitting needle (4).
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