Dongying Ruibo Machinery Manufacturing Co., Ltd is located in the central city of the Yellow River Delta Dongying where lies Chinaâ??s second largest oil field Shengli Oil field. It is only three hoursâ?? drive from Dongying to Qingdao port that enjoys high popularity in the world, which endows us with the geographical edge over other competitors in the same industry. As a major manufacturer of investment castings, we adopted the lost-wax process to serve a huge variety of markets that require metal parts in carbon steel, stainless steel and different kinds of alloy steel, including marine hardwares, construction hardwares, kitchen hardwares, pipe fittings, auto parts, railway parts and other machinery parts. We are able to supply precision castings in many conditions involving heat treated, machined, electropolished, mirror polished and so on.