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Hilltake IndustriesBalaju, BId, 44600 Kathmandu / Nepal +977 1 4388691/4388679/4389243 email@example.com
Drainage refers to the deliberate conduction of water using man-made devices. A distinction is made between open drainage (e.g. gutters, drainage channels) and closed drainage (e.g. rainwater downpipes).
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