GSM is shorted for Shaanxi Golden Stone Machinery Manufacturing Co.,Ltd., one High-tech enterprise as well as Metal Material Deep Hole Drilling Technology & Application Project Laboratory of Xi\'an City which is specialized in designing, manufacturing and marketing of deep hole drilling machines, gun drilling tools, auxiliary equipment and machine tool\'s accessories for decades. Besides, GSM is supported by National Innovation Fund.
The processor of GSM is Xi\'an Machine Tool Factory, pointed by the former National Machinery Industry Ministry in manufacturing deep hole drilling...