这些高频率与离心机的转速相对应；美国对能够以600赫兹以上频率运行的频率转换器驱动的出口进行了严格管控。
These high frequencies correspond to the rotation speeds of centrifuges; America tightly controls the export of frequency converter drives able to operate at frequencies above 600 Hz.
高音采用了B&W的鹦鹉螺管装的设计，很好地遏止共振并增强高频表现。
The tweeters feature B&W's Nautilus tube-loaded design claimed to dampen resonance and improve high-frequency sounds.
国内在这些专用集成电路的研制工作中所面临的主要困难，是高耐压高频结型场效应对管的工艺制作。
A big challenge to the development of this type of ASICs is the fabrication process for high-voltage, high-frequency pair JFETs.
速调管一种用速度调节的方法放大或产生超高频率的电子管。
An electron tube used to amplify or generate ultrahigh frequency by means of velocity modulation.
感染的高频率与侵入设备的使用，特别是中央线，导尿管和通风设备密切相关。
High frequency of infection is associated with the use of invasive devices, in particular central lines, urinary catheters, and ventilators.
它是现代高频直缝焊管生产线和冷弯型钢生产线的主要设备之一。
It's one of the main machines in the modern pipe mill line and formed section line.
上海申花钢管有限公司在114高频焊管机组上突破传统冷弯变形方法，设计出强力焊管。
Ltd by breaking through traditional cold-bending forming change on OD 114 mm high frequency welded pipe units.
这种高频电源较好地实现了开关管的零电压（ZVS）软化，得到了较宽的调功范围。
The high frequency inverter used here can achieve zero voltage soft switching (ZVS) and wide power regulation range.
本文讨论了砷化镓双栅场效应管在电视接收机UHF频道选择器中作高频调谐放大和变频应用时的一些考虑，并给出有关的实验结果。
This paper goes into the application of the GaAs Dual-Gate FET to the high frequency tuning-amplification and frequency conversion in a TV UHF channel selector and gives some experimental results.
介绍了一种快速分析高频直缝焊管焊接质量的方法——酸洗试验。
The rapid analysis method of welding quality, acid washing test, for the longitudinally high frequency welded pipe is introduced.
介绍了高频焊管对焊接工艺的要求，提出了有关工艺及技术参数。
The demand to welding process of high-frequency welding pipe is introduced, some related parameters proposed.
迄今为止，又有学者提出，用1411型高频电刀进行根管消毒的实验研究，效果良好。
Up to now, some scholar experimentalized to disinfect root canal with 1411 type high frequency electrotome.
介绍了利用高频开关管IGBT构成模块化充电电源的主电路、控制电路及保护电路的结构、原理。
The structure and theory of main circuit, control circuit and protection circuit of modularized charge power supply composed by IGBT high frequency switch tubes are introduced in this paper.
线性压缩机、回热器、脉冲管以及惯性管的耦合特性对高频脉冲管制冷机的整机性能有很大的影响。
Matching characteristics among linear compressor, regenerator, pulse tube and inertance tube have large impact on the performance of high frequency pulse tube cryocooler.
采用高频脉冲微束等离子弧做为电子管阴极和光刻栅极装配钎焊工艺的热源，提高了钎缝质量和产品的可靠性。
Brazing quality and product reliability are both increased as using high frequency pulse microplasma arc heating process for assembly brazing of cathode and photoetching grid of electron tube.
目的探讨高频超声对肘管、腕管综合征的诊断价值。
Objective To evaluate the diagnostic value of high frequency ultrasound in cubital and carpal tunnel syndrome.
从理论和实践方面论证了成组技术在高频直缝焊管生产中应用的必然性、可行性。
The inevitability and feasibility of application of the grouping technique to production bf hi-frequency welded tubes are discussed from both theoretic and practical point of views.
它可用与制作发光显示器件、高频滤波器、发光二极管、激光器、高速光开关等器件，在民用及军事领域都有着重要的用途。
It can be used to fabricate display devices, high frequency filters, emitting diode, lasers and high-speed optical switch. Therefore, it has great USES in both civil and military fields.
结论高频超声检查对甲状腺舌管囊肿的诊断及鉴别诊断具有一定特征性及临床价值。
Conclusion Ultrasonography shows certain characteristics and clinical value to diagnose and distinguish thyroglossal duct cyst.
本文介绍一种简便分析典型晶体管高频电路的方法。
A simple approach is presented to analyse a typical high frequency transistor stage.
介绍了对某型号高频大功率晶体管进行的失效分析。
In this paper, the failure analysis of a type of high frequency power transistor is introduced.
对高频屏蔽波纹管进行了热测试和阻抗测试。
RF shield bellows have experienced a heat test and an impedance test.
高频焊接制管是最快和最有效的制管方法，但高频焊接制管会产生各种各样的焊接缺陷。
The high frequency welded pipe production is the fastest and the most efficiency way to produce pipe, but it also produces varies kinds of weld defects.
方法分析15例经手术和病理证实为体表淋巴管瘤的高频率彩超表现。
Methods Superficial lymphangioma proved by operation and pathology in 15 cases were analysed with high frequency color Doppler ultrasound.
这一过程的一个主要特点是，它同时生产PNP和NPN晶体管，这使得高频宽带设计，如在HA- 5033，实用。
A major feature of this process is that it produces both PNP and NPN high frequency transistors which makes wide bandwidth designs, such as the HA-5033, practical.
半导体放电管是新一代抗浪涌保护器件，极间电容是其应用到高频环境下的一个限制因素。
Semiconductor arrester is a new type of surge protection device, which, however, has a large interelectrode capacitance, thus limiting its application in high frequency systems.
介绍了因单个高频大功率晶体管输出能力有限而采用多管并联运用(积木式)的方法。
Introduced the method of multi-transistor modular design, for the output ability are limited in single high-frequency power transistor.
通过对电子管高频振荡线路的分析和对导磁体感应器的试验，制作了合适的高频导磁体感应器。
Suitable high frequency magnetic conductive inductor was made through analyzing the high frequency vibrating circuit of electron tube and doing an experiment of magnetic conductive inductor.
确信你的耿氏二极管没有同时在音频或高频振荡。
Be sure your Gunn diode doesn't oscillate at audio or HF as well.
确信你的耿氏二极管没有同时在音频或高频振荡。
Be sure your Gunn diode doesn't oscillate at audio or HF as well.
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