... NameMain ProductsMaterialPart of Technical RequirementJiangsu Pengfei Group Co.,Ltd.Support roller, kiln tyre, girth gearZG35CrMo, ... gearZG35CrMo,ZG42CrMoUltrasonic test Grade 3Jiangsu Xinde Petroleum Machinery Co.,Ltd.Bop shell,cylinder head,ZG25CrNiMo,ZG30CrMoUltrasonic ... ,hydraulic pressure test max 52.5MpaShuangxin Petroleum Machinery Co.,Ltd.Bop shell,cylinder head,ZG25CrNiMo,ZG30CrMoUltrasonic ...