Unverified75% confidenceDecision RuleTime unknown

尺寸不要按均码买，务必量髌骨上方15cm处大腿围而非膝盖围——护膝主要靠上端锥形固定防止下滑，测错部位是护膝穿两小时就掉的主因

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Unverified护膝尺码按膝盖中心上方约15cm处大腿围测量，而非膝盖围度；偏紧2cm过度压迫致麻木，偏松则支撑失效并下滑87% similar Unverified选尺码应按运动时膝盖中心（髌骨）或大腿膝上15cm围度实测，而非平时裤码；针织加压型宁小勿大，套筒松了则完全失去加压固定作用84% similar Unverified尺码贴合优先量膝盖中心上方15cm大腿围而非膝围，护膝主要靠大腿收紧防滑；偏瘦人群按下限选，防止过松失去保暖和固定作用83% similar

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