Unverified82% confidenceDecision RuleTime unknown
要实现真正的负压密封（倒扣不漏水），需选带凹陷圆顶（拱形吸盘）设计的盖子，按压排气后靠大气压吸附；普通平盖仅防尘防溅、不防漏液
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82%
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