Isetyenziswa njengeetyhubhu ze-fumace, iityhubhu zokutshintshiselana kobushushu kunye nemibhobho kwizityalo zepetroliyam kunye nezokucoca

Isetyenziswa ekwenziweni kwemibhobho yodonga epholiswe ngamanzi, imibhobho yamanzi abilayo, imibhobho yomphunga eshushu kakhulu, imibhobho yomphunga eshushu kakhulu yeebhoyila zelocomotive, imibhobho yomsi emikhulu nemincinci kunye nemibhobho yezitena ze-arch, njl.njl.