The world's largest annual exposition on industrial technology is being held in Hannover, Germany. This year's trade fair features robots with smart features such as voice recognition and satellite navigation. Exhibitors say robotics is the future of industry.

Germany has been on the leading edge of the world's robotic industry, and the country's government has implemented an Industry 4.0 strategy, very similar to a Chinese version of industry strategy with an identical name, and it treats robotic as a vital element.

Experts say robots can be very effective tools to help humans finish tasks in unusual and sometimes hazardous environments.