结果显示心电阶梯现象的出现，绝大部分都提示心肌有广泛而严重的病变，仅极少数出现于与心脏无关的疾病或心脏无明显损害者。
Result show that staircase phenomenon is associated with severe myocardial damage in most patients and emerges occasionally in the patients without heart involvement.
本文在深入分析液压缸密封结构的基础上，提出了弧形与阶梯形密封的应用前景和气穴现象对密封的危害及消除方法。
This paper points out the potential applications of arc-shaped and stepped seal and the possible damage on cylinder seal cause...
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