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BL Tec Korea Limited Gyungin-ro, Yeongdeungpo-Gu775 Seoul / South korea +82 2 7220760 firstname.lastname@example.org
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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