Qingdao Youduojin Instrument Equipment Co., Ltd. is a high-tech enterprise specializing in the research, development, manufacturing, and operation of various testing machines, including high-strength bolt testing instruments (wedge load tensile test fixtures), large-scale high-strength bolt testing instruments for the wind power industry, slip coefficient testing instruments, anti-slip fastening tooling, steel pipe bending testing machines, rebar bending testing machines, metal wire repeated bending testing machines, metal wire torsion and winding testing machines, rock direct shear instruments, manhole cover pressure testing machines, impact testing machine series, electronic universal testing machines, pressure testing machines, manhole cover pressure testing machines, universal testing machines, horizontal tensile testing machines, steel strand relaxation testing machines, fatigue testing machine series, rebar joint repeated tension and compression testing machines, static anchoring testing machines, anchor mouth friction testing machines, testing machine accessories, torque wrenches, hardness testers, and various other testing equipment and testing machine accessories. The company also undertakes upgrade, transformation, and maintenance services for various testing machines. ...