yadu a yi amfani Tunnels gadoji, bawul ginshiki tsarin, najasa tsarin, subways, rikewa ganuwar, nukiliya ikon shuke-shuke, shipyards, ruwa waha da marine injiniya ayyukan ƙwarai, kuma high Yunƙurin gini ayyukan da ba na yau da kullum ko lankwasawa juna etc.
