Calculation of Assembly Ratio for Double Row Angular Contact Ball Bearings
双列角接触球轴承装配合套的分析计算
The Sum Problem of the Divergent Series Double Equal Ratio Series and Its Study
发散级数的求和问题双等比数列及其研究
Analysis of Reinforcement Ratio of Member in Bending with Double Layer of Reinforcement
双筋受弯构件的配筋率分析
Orthogonal analysis of transmission ratio of double universal joint of high speed loco bogie
高速机车双十字万向轴传动比的正交试验分析
Double toggle mold closing system with a large force magnification ratio and a large stroke ratio.
负后角双曲肘合模装置，大增力比和大行程比。
Analysis on Safety and Reliability of Double Saddles adopted in Gas Gathering Pipeline with Large Length and Radius Ratio
大长径比汇气管采用双鞍座的安全可靠性分析
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