duct

管, 输送管, 排泄管

通过管道输送

duct

1. a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snake's fangs"

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2. a continuous tube formed by a row of elongated cells lacking intervening end walls

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3. an enclosed conduit for a fluid

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