Power-operated sprayers for industrial or commercial use used in the coating of medical products, namely, rotary sprayers having rotary bell cups; power-operated atomizers for industrial or commercial use used in the coating of medical products, namely, rotary atomizers having rotary bell cups; power-operated sprayers, namely, electrostatic spray applicators for industrial or commercial use used in the coating of medical products, namely, electrostatic rotary atomizers having rotary bell cups...