... nameLiaocheng Jinshan steel pipe Co.,LtdBusiness TypeManufacturerProduction name api 5l x 52 carbon steel pipes Material45#,20# carbon steel20cr,40Cr,20CrMo ... steel pipe Co.,LTD in Shandong provinceour web www. Jinshangangguan.com Application rangeSteel tube,precision mechanical product, shock absorber sleeve in ...