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Ceiling
01
천장, 상한선
the highest part of a room, vehicle, etc. that covers it from the inside
Example
He stood on a ladder to change a lightbulb on the ceiling.
He installed soundproofing material on the ceiling to reduce noise from the floor above.
He noticed a water stain on the ceiling and called a professional to fix the leak.
02
천장, 구름 층 높이
(meteorology) altitude of the lowest layer of clouds
03
상한선, 최대 한도
an upper limit on what is allowed
04
천장, 고도한계
maximum altitude at which a plane can fly (under specified conditions)
