Boiling water sealing, high temperature vapor sealing, cold sealing (with nickel or nickel free), medium temperature sealing, organic polymer film and other sealing process were introduced.
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美
释义
介绍沸纯水封孔、高温水蒸气封孔、冷封孔(含镍和无镍)、中温封孔和有机聚合物膜等工艺。
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