Kugiyoyin sun dace da kowane nau'in injin ɗagawa na injiniya, kayan aikin ma'adinai na ƙarfe, jigilar tashar jirgin ruwa da saukarwa, injin gandun daji, kayan wuta, jirgin sama da na ruwa, jigilar ƙasa, masana'anta da haɓaka masana'antar hakar ma'adinai, haɓakawa, da sauransu.