Isalathiso sophuhliso: uphuhliso kunye nokuveliswa kweendawo ezingaphantsi kweekhareji zemigodi ephakathi kunye nenkulu.
Ugxininiso loPhuhliso: Uzibophelele ekuveliseni iindawo ze-excavator ezingaphakathi kunye ezinkulu, kwaye ke siya kuqhubeka nokuphucula iindawo ze-chassis zemifuziselo ye-excavator ephakathi kunye nenkulu, ukuphucula iteknoloji, iinkcukacha ezigqibeleleyo, kunye nokuhlangabezana neemfuno zabathengi abahlukeneyo. Ukubonelela abathengi ngekhwalithi ezinzileyo kunye nexabiso elifanelekileyo eliphakathi kunye neendawo ezinkulu ze-excavator undercarriage.
Kwixesha elizayo, u-Heli uya kuqhubeka esebenza nzima ukuphuhlisa, egxininise kwiindawo ezingaphantsi kwe-undercarriage of excavators medium and big --- "ezenziwe eHeli, iinxalenye ezinkulu ze-undercarriage".