发信号

• signal
• wigwag
• give a signal
• make a signal
• signalling
• signaling
• alerting

参考释义

发信号 [fā xìn hào]

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例句

1. 塔状物高耸纤细的建筑物，用于观察、发信号或泵压
   A tall, slender structure used for observation, signaling, or pumping.