When the sample is placed inside, the special gusseted bottom flattens out, allowing the bag to stand up on its own.
当样本放在里面，特别插角使
部变平，便直立了。
式;;;
,细绳;;;;;扣上;;When the sample is placed inside, the special gusseted bottom flattens out, allowing the bag to stand up on its own.
当样本放在里面，特别插角使部变平，便直立了。
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