Ningbo Daxie Development Zone Huashan Machinery Co., Ltd. was founded in 2001. We are specializing in the producing cylinder block of motorcycles and gasoline engine. Our factory specializes in inheritance and development the unique formula. We use novel resin sand casting process and high precision aluminum alloy die casting technology to make the brand HSP cylinder block, with the high quality high wear-resisting boron alloy cast iron material as the body. The hardness and good abrasion ...