Lub tog raj kheej hydraulic tsim tawm cov lus tsa suab tawm thiab siv cov khoom siv hluav taws xob zoo nrog cov tshuab hluav taws xob muaj peev xwm nrog cov kua hluav taws xob zoo heev nrog cov kua hluav taws xob me me
Cov cuab yeej siv hnyav, xws li cov excavator, cia siab rau cov kua roj hmab hydraulic yog hom kev tswj hwm cov pa hluav taws xob thiab kev ntseeg tau yooj yim thiab tsis yog tswj cov kua dej hauv lub lub tog raj kheej, tab sis feem ntau sib xyaw roj thiab kua ntau li .
