ASTM A53 B ERW Karfe bututu Aikace-aikacen 1 Gine-gine: matsakaicin bututu a ƙarƙashin ƙarin hakar ruwan ƙasa lokacin hasumiya, tukunyar jirgi, isar da ruwan zafi da sauransu.2 Injiniya, saiti masu ɗaukar nauyi, injin sarrafa kayan aiki da sauran na'urorin haɗi.3 Ajin lantarki: rarraba iskar gas, magudanar ruwan wutar lantarki.4...
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