parts per million
短语词组
- parts s per million 百万分率;百万分之
- parts w per million 百万分之一
- parts per million concentrationppm 浓度
- defective parts per million 缺陷零件每百万分之几;每百万零件不合格数;杰尔还是每百万缺陷数;每百万缺陷数
- equivalent parts per million 毫克当量
- defect parts per million 百万分之不良品数
- M Parts per million 百万分之
- parts per million range 百万分之几级 返回 parts per million