CO (16–15) (grey histograms), [OI]_63μm (red line), and OH at 1838 GHz (blue line) observations obtained in Cep E-mm (top panel), Cep E-BI (middle panel), and Cep E-BII (lower panel). The vertical dashed lines represent the central value for the velocity components identified by L15 in CO transitions: −125 (cyan), −68 (pink), and −10.9 km s^-1 (black; systemic velocity of Cep E). The spectral resolution is 1 km s^-1 for the Cep E-BI and BII spectra, and 4 km s^-1 for Cep E-mm.