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red and green buoys, navigation markers

Date:  04-12-2021

Advertiser:   yaoxing06@aliyun.com

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Website:http://www.flare-star.net
red and green buoys, navigation markers are navigational devices that float on top of the water.A buoy with a conical top is known as a "nun," while a buoy with a flat top is called a "can."