en septic system (n)
― IsA ⟶
Weight: 1.0
en human waste conversion device (n) Source: OpenCyc 2012
en septic system (n)
― IsA ⟶
Weight: 1.0
en system of devices (n) Source: OpenCyc 2012
en septic system (n)
― IsA ⟶
Weight: 1.0
en physical system (n) Source: OpenCyc 2012