9 Equipment for measuring and weighing, namely, dynamometers, load links, wireless load links; monitoring and controlling devices, namely, devices for the monitoring and controlling of dynamometers with built-in potentiometer; dynamometers; tension testers; force measurement products, namely, digital force gauges; electronic force measurement equipment, namely, digital force gauges; electronic tension measurement equipment, namely, tension testers; sensors, namely, Pressure sensors, Electric sensors, Motion sensors, Motion recognizing sensors; load cells, namely, electric load cells; safety devices, namely, electronic load monitors for use in preventing overloading or turning over of construction cranes; safety devices, namely, load monitoring apparatus for use in preventing overloading of construction cranes; testing apparatus and instruments, namely, electronic instruments for testing rope tension; electronic control units, namely, electronic controllers use in preventing overloading of construction cranes; angle measurement equipment, namely, angle sensors; electronic anti-collision systems, namely, anti-collision systems to avoid crane accidents comprised of antennas and receivers