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| частей на тысячу (1 ч. на тыс. = 0,1%) | |||
| промиль | |||
| частей на тысячу (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 ‰).) | |||
| English thesaurus | |||
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| p.p.m. | |||