The producing process and technical key of polyethylene postal bag are introduced and the advantage of polyethylene postal bag in place of pure cotton canvas postal bag is described.
简介丙纶邮政袋的生产工艺及技术关键，叙述丙纶邮政袋替代纯棉帆布邮政袋的优势。
The producing process and technical key of polyethylene postal bag are introduced and the advantage of polyethylene postal bag in place of pure cotton canvas postal bag is described.
简介丙纶邮政袋的生产工艺及技术关键，叙述丙纶邮政袋替代纯棉帆布邮政袋的优势。
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