DICT.TW Dictionary Taiwan
air hole
氣孔,河中不冰凍部分
Air hole
1. A hole to admit or discharge air; specifically, a spot in the ice not frozen over.
2. Founding A fault in a casting, produced by a bubble of air; a blowhole.
3. Aëronautics A local region in the atmosphere having a downward movement and offering less than normal support for the sustaining surfaces of a flying machine, causing an airplane to drop suddenly. Same as air pocket.
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air hole
n 1: a local region of low pressure or descending air that causes
a plane to lose height suddenly [syn: air pocket, pocket]
2: a hole that allows the passage of air