高考问答akg y50bt是个坑耳机吧:润滑脂等级分类中NLGI#等级是什么的缩写？
来源：百度文库 编辑：高考问答 时间：2024/04/29 16:09:33
NLGI Grade is a widely used classification for lubricating greases. It was established by the National Lubricating Grease Institute. Greases are classified in one of nine grades based on their consistency。
NLGI:National Lubricating Grease Institute因为它是被这个学院制定的。等级为1-9按照润滑脂的浓度。