Unverified80% confidenceDecision RuleTime unknown
选购按压式定量牙膏优先看泵头结构：真空活塞式（无残留见底设计）比普通弹簧泵头出膏更彻底，避免瓶底残留2-3g浪费，认准瓶身标注'真空泵'或'零残留'
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