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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无缝钢管业内各方关注的是,这次整治效果, 究竟能有多铁?
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低粘度金属加工油,适合于空调行业中预涂铝鳍片的冲孔加工, 也适合于铜管的弯管和胀管加工.
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Foshan Chancheng Nanzhuang Shangjin Copper Tube Factory is located at Pearl River Delta.
佛山市禅城区南庄上金铜管厂,位于我国发展迅速的珠江三角洲地区.
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采用优质的玻管和特殊的诱虫荧光粉,以产生特殊的紫外线波长.
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