卷边接合机 [机] seaming machine
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简单的凸缘卷边接合已被应用于类似的产品，GT避震口在生产过程中用四层结构进行凸缘卷边接合处理。
Simple Wulstumlage joint technology has been used in the similar products. GT flexible duct connector use four layers to join the Wulstumlage in its production process.
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