A drop manhole is provided if« Back to Previous Page
A. a sewer drops from a height
B. a branch sewer joins the main sewer at higher level
C. a lamp is inserted to check obstruction
D. none of these.
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B. a branch sewer joins the main sewer at higher level |
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B. a branch sewer joins the main sewer at higher level |
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B. a branch sewer joins the main sewer at higher level |
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