Taizhou City Kaiyu Metallurgy Machines and Tools Co., Ltd, with former company named" Zhejiang Kaiyu Drilling Bits Co., Ltd", located in Southeast coastal Zhejiang----Taizhou, economically developed and of convenient transportation, is devoted to researching and developing high-quality rock drilling bits. Kaiyu is established in the early 1970s, is one of the backbone enterprises among the wide domestic industry of rock-drilling tools. Our company has owned numerous experienced and high-tech talents...