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When the sample is placed inside, the special gusseted bottom flattens out, allowing the bag to stand up on its own.
本放在里面，特别插角使袋子底部变平，袋子便直立了。
When the sample is placed inside, the special gusseted bottom flattens out, allowing the bag to stand up on its own.
本放在里面，特别插角使袋子底部变平，袋子便直立了。
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