复合杠杆是指由于固定成本和固定财务费用的存在而导致的普通股每股利润变动率大于产销量变动率的杠杆效应。
一个有效的办法来验证复合杠杆的效率！
A neat way to demonstrate the effectiveness of the Compound Leverage.
为了更好的证明我发明了一个办法来说明这种复合杠杆结构的优势。
Feeling kind of dorky trying to explain this I have devised a way to show how much better the compound leverage is.
介绍了一种基于杠杆-铰杆增力机构的液压-机械复合传动装置的工作原理，给出了其力学计算公式。
The working principle of a kind of hydraulic-mechanical combination driving device based on lever-toggle force-amplifier was introduced in the article, its force calculation formulas are given also.
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