observation port
常见例句
- The transmission originated from a communications port in the observation deck itself.
傳輸源是在了望甲板的通信站上。 - An observation port is arranged in the outer layer coiling and cutting mechanism for checking coiling and cutting effects in real time;
外層卷削機搆中設有觀察孔，可以實時查看卷削傚果；
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