A method of high precision round subsection by varied lead-interval worm and worm wheel was introduced, its drive theory, clearance adjusted framework and machining method were analyzed.
介绍了一种采用变导程蜗轮蜗杆的高精度分度方法，分析变导程蜗轮蜗杆传动原理、变导程蜗轮蜗杆调隙结构和变导程蜗轮蜗杆加工和调整方法。
The oncological clearance, the complication rate, the disease free interval and survival were comparable in the two groups.
两组的肿 瘤清除情况、并发症发生率、无瘤间期和生存率无明显差别。
The oncological clearance, the complication rate, the disease free interval and survival were comparable in the two groups.
两组的肿 瘤清除情况、并发症发生率、无瘤间期和生存率无明显差别。
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