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与"vacuum envelope"相近的词条

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• vacuum drying
• vacuum drying apparatus
• vacuum drying oven
• vacuum electric furnace
• vacuum enterance of spirit
• vacuum envelope
• vacuum equiqment
• vacuum evaporating
• vacuum evaporation
• vacuum evaporator
• vacuum expander
• vacuum exposure frame
• vacuum exsiccator
• vacuum extraction
• vacuum extraction for artificial abortion
• vacuum extractor

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