Sewer ventilating columns are generally placed at« Back to Previous Page
A. distances 150 m to 300 m
B. upper ends of branch sewers
C. every change in the size of sewers
D. all the above.
|
▲ ▼ |
D. all the above. |
▲ ▼ |
D. all the above. |
Please log in to post questions/answers: