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平均粒径
avia.	average size
bridg.constr.	mean grain diameter; average size of aggregate; average grain size; average diameter of grain
desert.	average particle diameter
el.	mean diameter of grain
eng.geol.	mean size; median size; particle average diameter
hydroel.st.	average grain diameter; mean diameter; mean particle size
met.	mean particle diameter
oil.proc.	average particle size
tech.	average diameter; logarithmic mean particle diameter
wind.	mean grain size
平均粒径土中比之小的颗粒含量为总质量50%的粒径(d₅₀)
expl.	mean grain size
砂的平均粒径
archit.	average grain size (of sand)

平均粒径: 45 phrases in 11 subjects

Aviation	1
Bridge construction	1
Earth sciences	2
Electronics	3
Engineering geology	1
Explosives and Explosive Ordnance Disposal	2
Geology	1
Hydroelectric power stations	3
Metallurgy	3
Oil / petroleum	1
Technology	27