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Ukufakwa kweeraki ezininzi kwiishuttle ze-4D
Ishelufu yokugcina impahla eneendlela ezine yenziwe ikakhulu ziziqwenga zerack, iiSub-channel crossbeams, iiSub-channel tracks, izixhobo zetie rod ezithe tye, iiMain channel crossbeams, iiMain channel tracks, Uqhagamshelo lweerack kunye nomhlaba, iinyawo ezihlengahlengiswayo, iiback pulls, iiprotective nets, iimayile zokulungisa, Izinto eziphambili zeshelufu yiQ235/Q355, kwaye izinto ezisetyenziswa kwiBaosteel kunye neWuhan Iron and Steel zikhethwa kwaye zenziwe ngokuqengqeleka okubandayo.