请问各位物理大佬,同一根绳子张力处处相等,为什么对o点受力分析后,f1≠f3�? 知乎 Template




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tomski请问各位物理大佬,同一根绳子张力处处相等,为什么对o点受力分析后,f1≠f3�? 知乎 coloring