Anh
number concentration
particle count
particle number concentration
particle-count concentration
Đức
Konzentration
Teilchenzahlkonzentration
Pháp
concentration numérique
concentration numérique /INDUSTRY-CHEM/
[DE] Konzentration; Teilchenzahlkonzentration
[EN] number concentration; particle count; particle number concentration; particle-count concentration
[FR] concentration numérique