 |
| English | Chinese |
| parts per hundred million pphm | 一亿分之一10⁻⁸ |
| parts per million | 百万分之一 (ppm, 10⁻⁶) |
| parts per million of alkane | 烷烃百万分率 |
|
| English | Chinese |
| parts per hundred million pphm | 一亿分之一10⁻⁸ |
| parts per million | 百万分之一 (ppm, 10⁻⁶) |
| parts per million of alkane | 烷烃百万分率 |