Insimbi nensimbi njengebhizinisi eliyinhloko le-Hunan Great Steel Pipe, ukukhiqiza imikhiqizo yensimbi ye-premium kanye nenani eliphezulu elingeziwe futhi kukhuthaza izigaba ezintathu zemikhiqizo emikhulu, okuyi-carbon steel, insimbi engagqwali nensimbi ekhethekile. Imikhiqizo ethize:ipayipi lensimbi engenamthungo,ipayipi lensimbi ye-erw,isasa ipayipi lensimbi, ipayipi lensimbi ye-lsaw, i-casing, ishubhu, ipayipi lokubhoboza, ingxenye engenalutho, okokufakwa kwamapayipi njll ...