There was an increase in the consumption of meat last year. 去年肉类的消费量有所上升。
This paper introduces the consumption of PPTA fibers for friction materials, application of PPTA-Pulp and PPTA-Powder in PTEF composite materials. 摘要本文介绍芳纶在摩擦材料中的消费量,芳纶浆粕和芳纶粉末在聚四氟乙烯复合材料中的应用。