Unverified80% confidenceTradeoffTime unknown
膜越厚保气性越好越耐压,但同样长度下卷径更大、重量增加会推高快递计重,轻抛货物邮寄反而不划算,普通商品5丝单层足够
1
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80%
Confidence
Long-term
Relevance
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