Ma'anshan Haihua wear resistant material technology Co., Ltd. (HIDVIK) is a Certification of National New High-tech Enterprises specializing in R & D and production of various medium and high-end wear-resistant castings. The company adopts coated sand shell casting process and sodium silicate sand casting process, has 4 national invention patents and more than 10 utility model patents, and has obtained ISO: 9001 quality management ...