coefficient de friction w języku angielskim

coefficient of friction▼◼◼◼(ratio)
noun
[UK: ˌkəʊɪ.ˈfɪʃnt əv ˈfrɪk.ʃn̩] [US: ˌkoʊɪ.ˈfɪʃnt əv ˈfrɪk.ʃn̩]