Don manyan masana'antar wutar lantarki, tashar jiragen ruwa na jigilar kwal, ma'adinan kwal, ma'adinai, kayan gini da sauran wuraren da ke buƙatar cire ƙarfe mai yawa, kuma suna iya aiki akai-akai a cikin matsanancin yanayi kamar ƙura, zafi, da lalatawar gishiri mai tsanani. Hanyar sanyaya don filin lantarki a duniya.