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surface roughness
gen. 表面粗さ (ひょうめん・あらさ) Engineering and Science Technical Dictionary (James Friend) ; 表面粗度 (ひょうめん・そど) River and Water Resources Glossary (Infrastructure Development Institute Japan) ; 仕上面粗さ Engineering and Science Technical Dictionary (James Friend)
phys. 表面あらさ (hyōmen-arasa)
tech. 路面の粗さ (ろめんのあらさ)
surface roughness
: 2 phrases in 2 subjects
General1
Magnetics1