The first to ninth crank webs are roughly divided into three groups. The first group is from the second, fifth and eighth webs. These crank webs of the first group have similar shapes. In the crankshaft, the shapes of these crank webs belonging to the first group are adjusted to satisfy the first stiffness condition below.First stiffness condition:the second and eighth websthe fifth web W5
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机译：第一到第九曲柄网大致分为三组。第一组来自第二，第五和第八个网。第一组的这些曲柄腹板具有相似的形状。在曲轴中，属于第一组的这些曲柄腹板的形状被调整为满足下面的第一刚度条件。<？in-line-formulae description =“在线公式” end =“ lead”？>第一刚度条件：第二和第八腹板>第五腹板W5 <？in-line-formulae description =“在线公式“ end =” tail“？>
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