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| parts per mille (1 ч. на тыс. = 0,1%); parts per thousand (1 ч. на тыс. = 0,1%) | |||
| parts per thousand | |||
| parts per mille (Care must also be taken to ensure that ppt means parts per trillion and not parts per thousand. The latter unit is often used in isotope studies and is denoted ppm (parts per mille, or ‰).) | |||
| частей на тысячу: 2 a las frases, 2 temas |
| Matemáticas | 1 |
| Petróleo y gas | 1 |