ExecuteScalar 要求已打开且可用的 Connection。连接的当前状态为正在连接。
We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment. And they are mainly used to crush coarse minerals like gold and copper ore, metals like steel and iron, glass, coal, asphalt, gravel, concrete, etc. With more than 2,500 case sites, the scientific management method, the refined manufacturing process, and the innovative manufacturing concept,have rapidly grown into the mining machinery production and export bases in China even the world.
Copyright 2019.Henan Mining Machinery Co., ltd. All rights reserved. sitemap