I-Sered njengeetyhubhu ze-fumace, iityhubhu zokutshintshiselana ngobushushu kunye nemibhobho kwi-petroleum kunye nezityalo zokucoca

Isetyenziswa ekwenzeni imibhobho eludongeni epholileyo ngamanzi, imibhobho yamanzi abilayo, imibhobho yomphunga eshushu kakhulu, imibhobho yomphunga eshushu kakhulu yeebhoyila ze-locomotive, imibhobho emikhulu nemincinci yomsi kunye nemibhobho yezitena ze-arch, njl.