ASTM grain size number

ASTM grain size number
балл величины зерна по шкале ASTM (обозначение размера зёрен по отношению к числу зёрен на кв.дюйм (1 кв.дюйм = 6,452 см²) при увеличении в 100 раз в соответствии с уравнением: n=2^N-1, где n - число зёрен на кв.дюйм при увеличении в 100 раз, а N - балл величины зерна по шкале ASTM)

Англо-русский словарь промышленной и научной лексики. 2014.

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