This is a BHEL'S vintage advertisement for centrifugal compressors. BHEL's Centrifugal Compressors are of high efficiency and of low installation and maintenance cost. This old advertisement says
Key contribution to key industries :
BHEL's Centrifugal Compressors
Custom-built for Fertilizer, Petroleum, Refrigeration, Chemical, Steel and other plants
BHEL build several advantages into their large capacity Centrifugal Compressors:
High Efficiency Minimum Space Needs Dependability Low Installation and Maintenance Costs!
Look at the variety:
Low, Medium and High Pressure Multi-Stage Compressors with or without Inter-Coolers.
Isothermal Compressors with Built-In-Inter-Coolers
Low Pressure Single Stage Compressors Used as Industrial Fans or Boosters
High Pressure Single and Multi-Stage Compressors for Medium and High Pressure Processes
...all with ancillaries With three Plants at Hyderabad, Tiruchirappalli and Hardwar. BHEL manufactures a wide range of equipment for generation, transmission and utilization of electric power.