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Recent Boeing 737 and Airbus A320 can use different engines:

• CFM56 models -3B, -5A, -5B, -7B,
• IAE V2500,
• PW1100G,
• LEAP

All have annular combustors, single (SAC) or double (DAC ) for NOx reduction. However older versions of Boeing 737, -100 and -200, used a JT8D engine with cannular combustors, the beast you got. In cannular type, the individual combustion zones share a common annulus casing:

Source.

Detail of a combustor:

Source.

More information about turbofans (pdf).