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heliogram

n. 反光信号

1、反光信号

... heliochromy，彩色照相术 heliogram，反光信号 heliograph，日光仪 ...

2、回光信号

... heliodor金绿柱石 heliogram回光信号 heliograph日光仪 ...

3、日光反射信号

... 日光电报信息日光反射信号器发送的nheliogram 日光反射信号 heliogram 日光反射信号器 heliograph ...

经济学

n.a message transmitted by means of the sun's rays

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