在购物前要询问商家的退换货政策。
Ask the merchant about their exchange and return policies before making your purchase.
在既定时间内，不违反连锁总部政策的前提下，允许加盟商退换货。
It would be allow to return and change the products if it does not disobey headquarter's policy and within the promising time.
在既定时间内，不违反连锁总部政策的前提下，允许加盟商退换货。
It would be allow to return and change the products if it does not disobey headquarter's policy and within the promising time.
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