The new winter ventilation system consisted of a perforated plastic tube. 新的冬季通風(fēng)系統由帶孔的塑料管組成。
The shape of the die decides the shape of the extruded plastic-a fibre, perhaps, for use in nylon thread, or a tube. ?？诘男螤顩Q定了擠出塑料產(chǎn)品的型狀，如制尼龍繩用的纖維絲或塑料管。
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