The quality of film selection of optical grade polyester film.
而优质膜选用光学级聚酯膜。
The reasons and countermeasures for the high acetaldehyde content in the bottle grade polyester chips are discussed.
探讨瓶级聚酯切片乙醛含量高的原因和采取的对策。
The dyeing and printing process for polyester and its acid modified blend fabrics is groped, the reasonable conditions are defined, quality and grade of the fabric are raised.
对涤纶酸改性混纺织物的染整工艺进行探索，制定了合理的生产工艺，提高了织物的质量、档次。
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