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聚乙烯塑料薄膜是人们不可缺少的生产、生活资料,它与人们的生产、生活息息相关,也是社会发展和进步的具体体现。由于长时期大量依
Polyethylene plastic film is indispensable to people’s production and living materials, it is closely related to people’s production and living, but also a concrete manifestation of social development and progress. Due to a large number of long-term