The investigation was made on first quality index of raw material (PP) for producing fine PP fiber in domestic factories.
通过对国内目前所需细旦丙纶原料（聚丙烯）的质量指标进行调研，制定出相应的质量指标体系。
The investigation was made on first quality index of raw material (PP) for producing fine PP fiber in domestic factories.
通过对国内目前所需细旦丙纶原料（聚丙烯）的质量指标进行调研，制定出相应的质量指标体系。
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