The instantaneous impact force is linear with impact distance, and depends on the difference in tension between descending and ascending vessels and the elastic coefficients of hoisting ropes.
结果表明：防撞梁的瞬态冲击载荷不仅与冲击距离呈线性关系，而且和提升容器下降侧与上升侧的张力差、提升钢丝绳的弹性系数有关。
With the decrease of carcinoma differentiation level, HHV-6 positive rates showed a descending tendency while exited no statistical difference (P>0.05).
随着鳞癌分化程度的降低，HHV-6的阳性率有下降的趋势，但无统计学差异（P>0.05）。
With the decrease of carcinoma differentiation level, HHV-6 positive rates showed a descending tendency while exited no statistical difference (P>0.05).
随着鳞癌分化程度的降低，HHV-6的阳性率有下降的趋势，但无统计学差异（P>0.05）。
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