In the factory to do medical equipment polishing will be harmful to the human body?

Harmful. The tiny copper powder can be inhaled into the respiratory tract or stained on the skin. Work with a good mask and gloves (preferably cloth gloves), wash your hands and take a shower. Will reduce the harm. Copper is a heavy metal that is harmful to the body. If you are in a regular company, this is considered special operations. There will be a variety of subsidies and early retirement treatment.