Mechanical efficiency yog hais txog qhov feem pua ntawm cov khoom tso tawm (kev ua haujlwm zoo) thiab kev ua haujlwm tawm tswv yim (kev ua haujlwm zoo) ntawm lub tshuab thaum lub tshuab ua haujlwm ruaj khov.
Mechanical efficiency
Nov 30, 2021
Xa kev nug