Compressors Introduction : positive displacement type, dynamic compressors, reciprocating type, rotary type with sliding vanes, multiple vane type, single screw or twin-screw type, scroll compressors, radial flow type or axial flow type, hermetic type, semi-hermetic type, reciprocating compressors, schematic, suction pulsation bottle, discharge pulsation bottle, rolling piston type, discharge, suction sliding vanes, cylinder block, cooling water jacket, check valve, off-center rotor, casing, rotary screw compressors, assembly of screw compressor.