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40a1 t470p底x240 t440sx250t450x270 p50 扩展底座 坞t460s
兼容X270T460T470P电池
联想笔记本充电器E431E400E450CE460E465E470E470CX230SX240X240T440ST450ST60SG40GG40-30G40-70G40电源线
T440SX250电脑适配器 笔记本电源X240S5方口S3 E431方口