假设老枪屁股处摩擦力为零，这腿上300公斤，背上也300公斤，还真的100斤担子走200里山路不用换肩

来源: 500miles 于 2025-09-17 08:36:29 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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