Unverified78% confidenceSolutionTime unknown
选带挂绳孔且孔径匹配伞绳(约4mm)的哨,或直接选带反光挂绳/别针款;缝在救生衣、背包肩带固定位置比放在口袋更符合国际求救规范(3声短哨为求救信号)
1
Sources
78%
Confidence
Long-term
Relevance
-
First Seen
Sources
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