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国内第一条高强度系列密封胶生产线最近在山东建成投产,其中的聚氨酯型、有机硅型两种密封胶填补了国内空白。这条生产线
The first high-strength series sealant production line in China was recently completed and put into operation in Shandong, and the polyurethane sealant and silicone sealant filled the domestic blank. This production line