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我的宝宝 1岁半, 20多磅, 是不是 一定要买个20-40磅的,到他大了, 再买个40磅以上的? 就象你说的,再买个booster? i am really confused.... Y5 Y o6 K1 ^- j
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on the manuel of 3 in 1 carseat, it says the only difference is the back height, the belt even is the same size.......