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资料名称：【初中物理】90分钟搞定简单机械 132834

资料类型：初中讲座

资料大小：233 MB

更新时间：2018-01-31 08:45:41

软件简介：

【初中物理】90分钟搞定简单机械

第1讲：杠杆与滑轮

第2讲：复杂的组合机械

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