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trap-door的英文翻譯是什麼意思，詞典釋義與在線翻譯：
英英釋義
名詞 trap door:
-
a hinged or sliding door in a floor or ceiling
trap-door的用法和樣例：
例句
用作名詞 (n.)
- In one corner a ladder went up to an open trap door.
角落裡有一道梯子，通往上面敞開的活板門。 - Elevator maintenance can be carried out from outside the well through a trap.
可以通過活板門在電梯運行井道外維修電梯。
