The easy and correct theoretical calculating formula is provided for calculating degree of freedom of planar and spherical mechanism.

为计算平面、球面机构与结构自由度提供了更为方便快捷正确的理论计算式。

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Based on the model of straightening process, theoretical basis of formula calculating straightening amount was analyzed. It is helpful for design and development of automatic straightening machine.

根据校直过程模型，对现有校直修正量的计算公式进行了理论分析，为自动校直机的开发研制提供了技术支持。

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The formula of calculating Softswitch traffic was deduced, provided the theoretical bases for the designing and analysis of a Softswitch system.

最后推导出软交换话务量计算的数学公式，为软交换系统的分析与设计提供了理论上的依据。

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