Zhangjiakou Xuanhua Jinke Drilling Machinery Co., Ltd (JK Drilling) is a large enterprise specialized in development and manufacture of all kinds of DTH Drilling Equipment. The major products include All-In-One type and separate type DTH rock drilling rigs, DTH well drilling rigs and construction drilling rigs. The DTH rock drilling rigs are widely used in blasthole drilling of mining, hydropower, transportation and defense projects, as well as harbor and channel construction; DTH well drilli