WATER FLOTATION DEVICE WITH MEGAPHONE
收藏国家林业和草原科学数据中心2023-02-12 更新2024-03-07 收录
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资源简介：
A water safety flotation device includes a buoyant body and a hollow core. The buoyant body has a length and a width， with the length defining a longitudinal axis of the device. The hollow core extends along the longitudinal axis of the body. The hollow core is substantially conical and provides a first opening in the body at a first end and a second opening in the body at a second end. The hollow core serves the function of a megaphone.
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国家林业和草原科学数据中心创建时间：
2023-02-12
