70 kinds of ores mining technologies and experience and 112 patents. more than 2000 mine design and research, equipment supply projects. more than 500 mineral epcmo engineering projects all over the world. xinhai has established multiple overseas offices and exported to more than 90 countries and regions.,intelligent mining machine manufacturer,sand makers are also called sand making machines. sand maker is made primary equipment of sand production line. the machine is designed for highway, railway, high-rise construction,municipal, hydropower dam construction, and concrete mixing station, providing handmade high-quality sand and gravel aggregate.