Whistle post
![An old whistle post in the United States](/Images/godic/202502/20/Whistlepost3838.jpg")
![Whistle post on the North Shore Scenic Railroad in Minnesota](/Images/godic/202502/20/WhistlePost3839.jpg")
![Whistle post with multiple crossings in Valdosta, Georgia](/Images/godic/202502/20/Whistle_post_with_multiple_crossings,_near_Savannah_Ave,_Valdosta3839.JPG")
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A whistle post (or whistle board), in railroad usage, is a sign marking a location where a locomotive engineer is required to sound the horn or whistle.
Whistle board
英语百科
- Oxosalicylato Bismuth
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