Unverified75% confidenceDecision RuleTime unknown
选购时头围测量应以两耳根连线绕过下巴一圈为准，弹性套头式适配范围通常±3cm，误差超过则松脱或压迫；短鼻犬（法斗/巴哥）需选带下颌固定带的款式，纯套头式极易被甩掉
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