用氧化锌作为阴极的场发射器件将具有更好的真空特性。
A good vacuum property of field emission devices with cathode can be expected.
分析和测试了喷嘴的真空特性，设计了一套基于喷嘴油雾回收系统。
A method of using vacuum characteristic of a nozzle to reuse the oil mist generated during machining operation was put forward.
100目以下物料溶液合成纤维、结晶真空液、乳油液甘薯片、矿砂等悬浮液型号和技术特性。
Models and technical features of synthetic fiber, crystallization vacuum liquid, emulsion liquid, ore and other suspended liquid under 100 mesh.
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