42 Quality control during manufacturing, installation, maintenance and dismantling of electric cables, electric transmission and distribution cables, conductor cables for high-voltage power lines and composite cores for power transmission and distribution cables; technical inspection during manufacturing, installation, maintenance and dismantling of electric cables, electric transmission and distribution cables, conductor cables for high-voltage power lines and composite cores for power transmission and distribution cables; manufacturing control, installation, maintenance and dismantling of electrical cable installations, electrical transmission and distribution cables, conductor cables for high-voltage power lines and composite cores for power transmission and distribution cables