管

The diverse types of tracheary elements and perforation plates in secondary xylem of A. asiatica show that previous knowledge about the tracheary elements and perforation plates in secondary xylem of A. asiatica is not complete and thus any inferences about the aboriginality and evolution of a taxon made depending on these traits are not reliable.

根据类叶升麻次生木质部中多变的管状分子类型，认为以往积累的有关毛茛科植物管状分子类型及导管穿孔板类型是不全面的，因此以该性状为参考作出的有关某一个类群的原始性和进化性的推论也是不可靠的。

The physical interpretations,character and suppressing methods of absolute instability were analyzed and verified by a W-band TE_(01) experiment.

通过回旋行波管色散方程，详细分析了W波段基波回旋行波管绝对不稳定性的形成和特征，提出了采用多段损耗波导来抑制绝对不稳定性的方法。

Therefore, the interaction structures with distributed wall losses and attenuating severs were more stability for absolute instability and gyrotron backward oscillations.

藉由引用非线性程式进行磁旋行波放大器稳定分析，结果显示散布式损耗(distributed-losses)的设计对绝对不稳定有明显的抑制作用，而隔离管结构亦具有减短磁旋返波振荡作用长度的效用，因此我们采用兼具隔离管及散布式损耗结构的磁旋行波放大器，同时提升绝对不稳定和磁旋返波振荡的稳定性。

This paper, with the analysis of the propagation characteristics in a lossy cylindrical waveguide and using small-signal theoretical dispersion relation, presents study on the device stability with influence of the absolute instability and the backward wave oscillation in TE01-mode lossy dielectric-load gyrotron traveling wave amplifier.

摘要该文从分析损耗介质加载金属圆波导中电磁波传输特性出发，应用回旋行波管放大器小信号色散方程，研究损耗介质加载结构TE01模回旋行波管放大器绝对不稳定性振荡和回旋返波振荡对器件稳定性的影响。

Its main products include: medical X ray tubes, image intensifier tubes and rotating anode X ray tubes etc., which are all in conformity with the national standards and registered with the "Yuan Xing" trade mark.

主要产品有：医用X射线管、影像增强管、下球管等，均执行国家技术标准，以&元星牌&为注册商标。

The cathode-ray tube or "Crookes' tube" like object depicted in scenes from the temple of Hathor at Dendera may depict a relativistic source of these heavy electrons - which could drastically expedite the magical processes which involve these particular tubes.

阴极射线管或&克鲁克斯管&就像来自Dendera哈索尔神庙场景里描述的物体可能描述这些重电子一个相对论的来源点-重电子可以激烈加速这奇异的局限在这特别管里的作用过程。

Is located in Tianjin Jinghai County taegu Zhuang East Road, Huangshan, is a manufacturer of spiral pipe, galvanized pipe, high-frequency welded pipes, such as attachment, as well as the professional specializing in the production of export manufacturers.

天津华程钢管有限公司位于天津市静海县大丘庄黄山东路，是一家生产螺旋管、镀锌管、高频焊管等管道附件以及专业生产出口的专业生产厂家。

Twenty five ASAⅠ-Ⅱ patients undergoing elective upper abdominal surgery were randomly divided into two groups:group Gand group C（combined general-epidural anesthesia）.

将25例ASAⅠ～Ⅱ级上腹部择期手术病人随机分为两组：G组按常规方法诱导后行气管内插管全麻，C组先行硬膜外穿刺注药置管后再行气管内插管全麻。

The two methods were respectively used to make dynamic analysis for air compartment of a certain three-tube Gatling gun with inner energy sources, while ensured the changing rule of pressure in airway equipment while weapons are firing, then analyzed the key structure elements which cause the change of the pressure, thus provide a theoretic basis for parameter design of gas operated Gatling gun with inner energy sources.

分别运用2种方法，通过对某内能源三管转管机枪的导气装置进行动力学分析，确定武器在使用过程中导气室内的压力变化规律并分析影响其压力变化的主要结构因素，为内能源转管机枪的参数设计提供理论依据。

The optimization design method offers a practical way for reducing the power consumption and fluctuation of fire rate of gatling gun mechanism.gatling gun; genetic simulated annealing; optimization design

本文在此基础上，结合遗传退火模拟算法，建立转管武器的多目标优化模型，同时考虑减小射速波动、降低系统功耗和降低后坐力的转管武器自动机系统优化方法，1 转管武器自动机的优化模型1。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。