machalgye
tribometer
tribomètre ; appareil de mesure de friction
마찰계는 재료의 마찰 특성을 측정하는 데 사용됩니다.
Machal-gye-neun jaeryo-ui machal teukseong-eul cheugjeonghaneun de sayongdoemnida.
A tribometer is used to measure the friction properties of materials.
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