A. Inverted syphon
B. Depressed sewer
C. Sag pipe
D. all of these
Correct Answer: all of these ✔
Last Updated: August 25, 2020
A. Inverted syphon
B. Depressed sewer
C. Sag pipe
D. all of these
Correct Answer: all of these ✔
Last Updated: August 25, 2020