Unverified82% confidenceDecision RuleTime unknown
胸针直径超过5cm或重量超过30g时，普通别针式（单针）扣易导致薄面料下垂拉扯，应选双针（防转设计）或磁吸式固定
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82%
Confidence
Long-term
Relevance
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Unverified胸针直径超过6cm或重量超过30g时，单点固定易导致面料下垂变形，应选双针或带辅助固定链的款式93% similarUnverified针扣直径应≥0.7mm，过细的针易弯折且难以穿透厚织物；针长与胸针主体重量匹配，重量＞30g的胸针需双针或转轴扣结构防止下垂翻转89% similarUnverified胸针尺寸建议控制在4-6cm，超过7cm易压垮薄面料且显厚重；针织衫、雪纺等轻薄面料应选5cm以内且带衬垫或双针固定的款式，避免留下明显针孔82% similarUnverified重量超过30g的宝石/金属大胸针会拉扯轻薄面料下垂变形，重款胸针需搭配挺括厚面料（呢料、粗花呢）或多点固定82% similarUnverified搁板悬臂越长下垂力矩越大：60cm以上长搁板建议板厚≥3.8cm且内嵌双钢管，或增加隐藏三角托，否则中部易挠曲变形81% similar
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