[KongchangAI]
Unverified90% confidenceFactTime unknown

PP聚丙烯是所有常见绳索材质中密度最低的,比重小于1能浮于水面,这是其作为救生绳、浮标绳、渔业标记绳的核心物理基础

1
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90%
Confidence
Long-term
Relevance
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