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单词 θ191867
释义
society > communication > indication > signalling > [noun] > thing or apparatus used for (4)
signal1687

An object used as a sign to convey warning, direction, or information.

disc1856

Railways. A coloured disc used as a signal or forming the principal part of one; (also) a disc signal.

signaller1872

A device used to make signals.

shape1879

concrete in technical uses. Nautical. A cone, ball, or drum of metal or canvas used in signalling.

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更新时间:2025/1/3 22:58:43