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Soft packaging is plastic film, the seal means mainly through sealed vacuum heat sealing machine;
软包装主要是铝塑膜，其密封方式主要通过抽真空热封机进行密封；
youdao
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Soft packaging is plastic film, the seal means mainly through sealed vacuum heat sealing machine;
软包装主要是铝塑膜，其密封方式主要通过抽真空热封机进行密封；
youdao