Boiler tubes sanyaya a cikin dumama surface shambura Gudun lokaci count ko tabarbarewar yanayin aiki, bushe, a cikin wani ɗan gajeren lokaci don haka da cewa kwatsam karuwa a cikin zafin jiki na karfe bututu, zazzabi ya kai sama da rated zafin jiki, a tensile ƙarfi na karfe. raguwa sosai a...
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