[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

外置式封口机真空度普遍在-60~-80kPa(约0.6~0.8个大气压),无法达到腔体式的-90kPa以上;追求长期冷冻保鲜(6个月以上)或商用需求应选腔体式

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