Hydraulic machines, tools and apparatus, namely, hydraulic stud tensioners and hydraulic bolt torquing equipment; hydraulic power equipment, namely, hydraulic stud tensioners and hydraulic bolt torquing equipment; hydraulic power tools, namely, hydraulic stud tensioners and hydraulic bolt torquing equipment; machine tools for tensioning and releasing of bolts and for fastening devices with bolts; bolt tensioning apparatus, namely, hydraulic stud tensioners and hydraulic bolt torquing equipmen...