炮眼

炮眼
pàoyǎn
(1) [porthole]
(2) 掩蔽工事的火炮射击口
(3) 爆破前在岩石上凿的孔, 用来装炸药
(4) [embrasure]∶堡垒的墙或女儿墙上斜面向外扩大以便于炮击的洞口
(5) [port]∶装甲车上或工事上发射枪弹或炮弹的孔或槽

Advanced Chinese dictionary. 2013.

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