This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Stribeck curve zh. graph Tribology basic Stribeck curve own Randy Liu Twrandy zh Twrandy Original upload log zh Stribeck bytes Twrandy no Tribology basic Stribeck curve Common tribology knowledge made this copy by myself Randy Liu username NOTOC Tribology
Page 2023 Free-images.com. All images are Public Domain