与"vacuum power valves"相近的词条

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• vacuum photocell
• vacuum phototube
• vacuum plate、vacuum-plate
• vacuum plating
• vacuum plugging kit
• vacuum power valves
• vacuum preservation
• vacuum pressure tube
• vacuum pump、vacuum-pump
• vacuum pumping、vacuum-pumping
• vacuum-pumping equipment
• vacuum quantorecorder
• vacuum receiver
• vacuum recorder
• vacuum rectifier tube
• vacuum rectifying apparatus

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