There was an increase in the consumption of meat last year. 去年肉類(lèi)的消費量有所上升。
This paper introduces the consumption of PPTA fibers for friction materials, application of PPTA-Pulp and PPTA-Powder in PTEF composite materials. 摘要本文介紹芳綸在摩擦材料中的消費量,芳綸漿粕和芳綸粉末在聚四氟乙烯復合材料中的應用。