Unverified85% confidenceDecision RuleTime unknown
弹力布椅套（氨纶含量≥5%）依靠四面弹伸缩，适配椅面宽35-50cm的常规餐椅；氨纶含量＜3%的低弹面料容易松垮回弹差，套上后易滑动
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