Booster Compressor Market Size, Share & COVID-19 Impact Analysis, By Cooling Type (Air-Cooled and Water-Cooled), By Compression Stage (Single-Stage, Double-Stage, and Multi-Stage), By Discharge Pressure (Below 999 PSI, 1000-1499 PSI, 1500-4999 PSI, and Above 5000 PSI), By End User (Oil & Gas, Power Generation, Industrial, and Others), and Regional Forecast, 2021-2028