The interior of the tube must be kept a hard vacuum to preserve the photo cathode.
显象管内部一定要保证高真空才能保护光电阴极.
词典精选例句
Clinical application of direct vision stomach tube intubation by tongue depressor
压舌明视插胃管法的临床应用与研究
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可用轮胎工具或扁平的撬棒把轮缘的一端从轮辋辋圈上撬起。要当心不要损坏轮胎轮缘或内胎。
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Carbon content is closely related with quality of the seamless steel tube.
碳含量的高低对无缝钢管的质量影响较大.
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Introduced hot-rolling seamless steel tube to produce development trend of the technology.
介绍了热轧无缝钢管生产技术的发展趋势.
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Stress and metal flow in steel tube during sizing process were analyzed.
分析了定径过程中钢管内金属流动和弹复行为.
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Presently, expansion concrete is widely applied to arch steel-tube-bridge.
目前微膨胀混凝土在钢管拱桥中广泛应用.
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换向-比例阀及其在φ140无缝钢管厂的应用 ( 续完 )
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The working principle of heat pipe and its application in fire tube heater are introduced.
介绍了热管的工作原理及其在火筒式加热炉上的应用状况.
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在行波管整管性能中,波导与慢波结构的阻抗匹配具有关键作用.
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试验证实,蜡晶粒子剪切扩散对石蜡沉积没有作用,管内壁石蜡沉积主要是分子扩散的作用所致。
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Vane-radiator is an ideal cooling device for beam millimeter-wave traveling wave tube.
翼片式散热器是一种符合设计要求的理想散热结构.
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Analysis on 2158 Neural Tube Defects Diagnosed Prenatally hy Ultrasound Examination
2158例神经管缺陷儿的产前B型超声波诊断分析
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Inhibition of N-ethylmaleimide ( NEM) to Pollen Germination and Tube Growth of Lily
NEM对川百合花粉萌发和花粉管伸长的抑制效应
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The internal force modification factor of the hollow two-way slab with one-way laid tube is deduced.
推导出单向布管的空心 双向 板的内力修正系数.
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