按主体词字母查询
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V
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extract ventilation 抽气通风
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forced-air ventilation 压力通风,强制通风
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forced ventilation 强迫通气
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gravitational ventilation 重力通风,自然通风
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heading ventilation 掘进工作面的通风
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natural [draft] ventilation 自然通风,自然通气
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radial ventilation 辐向通风
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veneered a.镶板的;有饰面层的
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veneering 镶面,制成薄层木板
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vent 出口,通风孔,排气道;火山口,裂口
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air vent 通气管,通气孔
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secondary ventilation 辅助通风
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split ventilation 分流通风
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ventilation by extraction 抽气通风
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ventilation by forced draft 强迫抽气通风
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