Tianjin Ruijie Karfe Bututu Co., Ltd. ya ba da tan 2,500 na manyan bututun ssaw mai karkatar da bututu zuwa China Railway Group Limited a cikin 2018, waɗanda aka yi amfani da su azaman manyan bututun ƙarfe na ƙarfe. A diamita na karfe bututu ne 529-1660mm.
Mun samar da kusan tan 1800 na bututun karfe na ssaw mai karkace tare da OD 325-630mm, yana ba da tallafin bututun karkashin kasa don Gina filin wasa na Beijing. Kamfaninmu sau da yawa yana shiga cikin manyan ayyukan neman aikin cikin gida.
A shekarar 2016, mun samar da ton 1000 na manyan bututun karfe mai diamita na ssaw don gina filin jirgin sama na Beijing Daxing, wanda aka yi amfani da shi a matsayin aikin shimfida bututun karkashin kasa.
Haƙƙin mallaka © Tianjin Ruijie Steel Pipe Co., Ltd.
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