Iphakheji kanye nesitoreji esinconyiwe:
I-191 ipakishwe ema-drum ensimbi anesisindo esingu-220kg futhi inesikhathi sokugcina sezinyanga eziyisithupha ku-20°C. Amazinga okushisa aphezulu azofinyeza isikhathi sokugcina. Gcina endaweni epholile, enomoya, kude nelanga eliqondile futhi kude nemithombo yokushisa. Umkhiqizo uyavutha futhi kufanele ugcinwe kude namalangabi avulekile.