If you look at their patent carefully, especially if you have any engineering background or talent, you may decide that you see one or two points where the design is not perfectly adequate.  Doctor Ivan Schwab in California is one of the people, one of the main people, who helped answer the question, "Why don't woodpeckers get headaches?"
如果你仔细看看他们的专利 特别是如果你有任何工程背景或天分 你可能会看到这个设计有一两点 不完美的地方  加州的艾凡 · 施瓦布医生 他是帮忙找出这个问题的答案的 主要人之一 “为什么啄木鸟不会头疼？”