经典MM定理3表明：在无磨擦的完全市场下，财务政策和资本结构是不相关的。
MM theorem 3 indicates that financial policy is not related to capital structure in a market without friction.
结构设计类似三偏心硬密封蝶阀，具有操作轻便、开启过程无磨擦、零泄漏、寿命长等优点。
Structure Designed is similar to hard sealing of three - eccentric of butterfly valve, with convenient operation, without friction opened and leakage, long life.
无运动机构的磨擦磨损，机械效率高，这是涡旋式压缩机比其它空气压缩机大大节能的主要原因。
No movement mechanism friction wear, the mechanical efficiency high, this is type compressor vortex than other air compressor greatly energy saving main reason.
对负荷增大，但磨擦系数无敏感变化，因此重负荷下，磨擦系数极小，并且长期保持精度不变，可得机械使用寿命长期保持。
On the load increased, but not sensitive to changes in friction coefficient, so heavy, the friction coefficient is extremely small, and the same long-term accuracy can have long-term mechanical life.
旋涡气泵结构紧凑，体积小，重量轻，不需变速装置，除轴承外其它部位没有直接接触磨擦，噪音低，送出的气源无水无油。
Swirl pump is compact, light weighted and no speed-adjusting device needed, no friction except bearer, low noise, no water and no oil in the output air.
旋涡气泵结构紧凑，体积小，重量轻，不需变速装置，除轴承外其它部位没有直接接触磨擦，噪音低，送出的气源无水无油。
Swirl pump is compact, light weighted and no speed-adjusting device needed, no friction except bearer, low noise, no water and no oil in the output air.
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