9 Electronic load indicators; electronic stress gauges; optical fiber sensors; instruments for surveying physical data; measuring, detecting and monitoring instruments, namely, highly dynamic instruments for measuring bending, oscillation, acceleration, strain, temperature, force and pressure variables for rotor blades in wind turbines, electronic indicators and controllers for measuring bending and oscillation behavior of rotor blades in wind turbines; measuring, counting, alignment and calibrating instruments for measuring bending and oscillation behavior of rotor blades in wind turbines; measuring sensors for measuring bending, oscillation, acceleration, strain, temperature, force and pressure variables for rotor blades in wind turbines; precision measuring apparatus, namely, highly dynamic instruments for measuring bending, oscillation, acceleration, strain, temperature, force and pressure variables for rotor blades in wind turbines; rotation measuring sensors, namely, optical fiber sensors for measuring rotation of rotor blades in wind turbines; sensors used in plant control; sensors for measuring instruments, namely, optical fiber sensors for measuring rotation of rotor blades in wind turbines; sensors and detectors, namely, optical fiber sensors for measuring rotation of rotor blades in wind turbines