... , Coupling, Shank Adaptors, DTH Bits and hammer. Shandong Sanshan Group Co., Ltd. ("SSG") was established in 2003. It consists ... Ltd. and Yanggu Sanshan Natural Gas Co., Ltd. Our Group company's products include steel, rock drilling tools and mining tools ... Unit", "Shandong Province High-New Technical Enterprise", "Shandong Top-Star Enterprise of China Patent", "AAA Credit Enterprise", and "Shandong ...