Progressive Cavity Pump (PCP) Market Size, Share & COVID-19 Impact Analysis, By Pumping Capacity (GPM) (0 to 500, 500 to 1000, Above 1000), By Power Rating (HP) (Up to 50, 51 to 100, Above 100), By End-user (Oil & Gas, Water & Wastewater, Food & Beverages, Chemicals & Petrochemicals, Pulp & Paper, and Others), and Regional Forecast, 2021-2028