vacuum gap真空间隙
vacuumn.真空;真空吸尘器;空白adj.产生(利用)真空的v.用吸尘器打扫
vacuum fusion method真空熔化法,真空溶化法
vacuum triaxial test真空三轴试验
vacuum system design真空系统设计
vacuum card stripper真空式梳理机抄针装置
vacuum cleaner alloy真空吸尘器用铝铜合金
vacuum tank spreader真空罐式洒布机
vacuum evaporatation真空蒸发镀膜法
vacuum release valve真空解除阀
vacuum approximation真空近似法