Kev nyab xeeb thiab txij nkawm ntawm crane hooks

Kev nyab xeeb:

Kev nyab xeeb kev ua haujlwm ntawm tus nuv yog qhov tseem ceeb. Txhawm rau kom muaj kev nyab xeeb ntawm tus neeg teb xov tooj, tus nuv yuav tsum tau kuaj xyuas thiab tswj kom muaj kev nyab xeeb. Qhov no suav nrog kev txheeb xyuas tus nuv rau hnav, tawg, deformation, thiab fastening ntawm qhov txuas.
 

Kev tu:

Kev tu tsis tu ncua, lubrication thiab hloov qhov hnav ntawm tus nuv yog qhov tseem ceeb kom nws ua haujlwm zoo. Tsis tas li ntawd, cov chaw tsim khoom cov lus qhia thiab cov lus pom zoo yuav tsum tau ua raws li kev teeb tsa thiab siv kom raug.