并拢是为了尽可能地降低阻力，并拢后要来回错动拉地拔，硬拔应该只是一个方向地拔吧？

来源: Oneshotkill 于 2020-08-30 14:41:36 [旧帖] [给我悄悄话] 本文已被阅读：次

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