对剪刀式尾桨的气动特性进行了实验和分析研究。
An experimental and analytical investigation on the aerodynamic characteristics of a helicopter scissors tail rotor has been made.
然后，建立了一个剪刀式尾桨气动特性计算的分析模型，并进行了验证。
A free wake analytical model is then developed for predicting the aerodynamic characteristics of a scissors tail rotor and validated by numerical examples.
研究剪刀式尾桨气动噪声的混沌特性，并应用混沌理论进行了直升机尾桨气动噪声信号分析。
Chaos characteristics of the aerodynamic noise are discussed and the aeroacoustic noise signals on helicopter scissors tail rotor is analyzed by the chaos theory.
最初看到这个书的封面时，我曾有点怀疑：这是不是又是一本剪刀加浆糊式且带点哗众取宠性质的混搭作品呢？
Initially seen in the cover of the book, I have little doubt: is it right? This is a scissors and paste type and nature of the mix work with curry favour by claptrap?
手持式电动工具的安全性。第2-8部分：剪刀和步冲轮廓机的特殊要求。
Hand-held motor-operated electric tools - Safety - part 2-8: particular requirements for shears and nibblers.
为了便于手持式电动剪刀的移动，在剪刀身的底部适当的位置安装适当数量的滚轮。
In order to move the hand-held electric shears conveniently, proper positions at the bottoms of the shear bodies are provided with a proper amount of rollers.
为了便于手持式电动剪刀的移动，在剪刀身的底部适当的位置安装适当数量的滚轮。
In order to move the hand-held electric shears conveniently, proper positions at the bottoms of the shear bodies are provided with a proper amount of rollers.
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