Bitzer piston compressores reciproci in duo genera dividuntur: genus apertum et genus semi-hermeticum, compressor maxime compositus ex domo, crankshaft, virga connectens, bracteae pistonis valvae collectae, scapus sigillum integrum, oleum sentinam, capacitas regulator, oleum colum, suctus valvulam clausulam exhauriunt ac gasket etc. In agro Compressoris parcit annos ad intellegendum opus productum necnon eius specificationes technicas.