Abstract The circulation direct monitoring and sampling system (CDMSS) is used as a monitoring device for CO2 and O2 concentrations of bypass type in shake-culture flask. The CDMSS could measure k La. an index for evaluating the performance of aerobic culture incubators. and k G. https://www.roneverhart.com/MagnaFlow-2001-2005-Honda-Civic-Street-Series-Cat-Back-Performance-Exhaust-System/