Excavator roj hmab ncoo ua lub luag haujlwm tseem ceeb hauv kev tsim kho thiab kev lag luam mining, muab traction, stability thiab kev tiv thaiv rau cov tshuab thiab hauv av lawv khiav. Raws li thev naus laus zis txuas ntxiv mus, cov kev taw qhia yav tom ntej ntawm excavator roj hmab mats cog lus tias yuav txhim kho kev ua tau zoo ...
Nyeem ntxiv