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点评
大型正切臂啊...呵呵
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点评
这一刻开始,我对你极度失望。误差就是你的定义。“误差”造成的摩擦力差导致的离心力或向心力那个不是侧压。
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点评
原来是会画呀,为什么还分不清道理?还是找不到反驳的理由呢?
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