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condensation gutter, condensation channel, condensation groove, condensation trough
A trough-like depression in the top of the interior sill of a glazed opening, to receive and carry off moisture forming on the indoor face of the glass.
water channel, condensation channel
A trough-like depression in the top of the interior sill of a glazed opening to collect and drain away condensed moisture which forms on the interior face of the glass.