Ⅰ型、Ⅱ型曲柄摇杆机构急回特性两个命题的讨论
Ⅰ형、Ⅱ형곡병요간궤구급회특성량개명제적토론
The Discussion of the Two Propositions About Type Ⅰ and Type Ⅱ Crank-rocker Mechanisms' Quick-return Characteristic
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