Unverified80% confidenceFactTime unknown
矫形硬度分级：真正的矫形（矫正力）需硬质聚丙烯或碳纤维底壳，肖氏硬度Shore A≥70；缓震舒适用软质，Shore A 20-40；日常保健半硬质在40-60之间
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