Amapayipi e-carbon steel Sheduli angu-40 ahlukaniswa ngokusekelwe kwinhlanganisela yezinto ezihlanganisa isilinganiso sobukhulu be-diameter-to-wall, amandla wezinto ezibonakalayo, ububanzi bangaphandle, ukushuba kodonga, namandla okucindezela. Ukuqokwa kweshejuli, njengoHlelo 40, kubonisa i-c...
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