GB/T 25895.2-2020水域安全标志和海滩安全旗第2部分:海滩安全旗颜色、形状、含义及性能的规范标准
英文:Water safety signs and beach safety flags—Part 2: Specifications for beach safety flags colour,shape,meaning and perf...
英文:Water safety signs and beach safety flags—Part 2: Specifications for beach safety flags colour,shape,meaning and perf...