等轴的

Aimed at the common problems for the mechanical seal of large-scale desulphurization circulating pump during operation process,such as vibration,axial impact and dry friction and so on,a new mechanical seal with bumper and reduce expenditure ring was designed,which is suitable to working condition requirements and the characteristics of sealed cavity of large-scale desulphurization circulating pump.

针对大型脱硫循环泵工作过程中机械密封存在的易出现振动、轴向冲击和干烧等问题，通过设计缓冲垫和节流环等新型结构，研制出一种适合大型脱硫循环泵工况要求和密封腔体特点的新型机械密封装置，并介绍了该新型密封装置的结构设计和主要的技术特点。

Three axis optical tracking test table is a kind of powerful instrument used to reproduce the flying posture of flying weapons in laboratory.

摘要三轴光学跟踪试验转台是一种在实验室条件下复现飞行器或导弹在空中飞行姿态半实物仿真的有力工具，它和目标发生装置组合在一起模拟导弹跟踪目标的过程，可以真实地模拟出导弹等飞行器在空间的各种姿态和动力学特性，从而对其传感器件、控制系统和执行机构等硬件设备的性能加以测试和评价，为飞行器的研制、改进和再设计提供各种参考依据。

ABSTRACT Three-axis flying posture simulator is a set of precise and sophisticated equipment with important significance of economy and national defence. TFPS is a kind of powerful instrument used to reproduce the flying posture of flying weapons in laboratory. TFPS, together with equipment producing infrared target, simulates the attacked target and flying missile, which can really simulate the various flying postures in space and dynamic characteristics. Thus, the performances of sensors, control system and actuator and so on can be tested and evaluated, which provides various reference bases for developing, improving and redesigning flying weapons.

三轴飞行姿态仿真转台是具有重大经济价值和国防战略意义的高精尖试验设备，它是在实验室条件下复现飞行器或导弹在空中飞行姿态的有力工具，它和红外目标发生装置组合在一起模拟袭击目标和飞行导弹，可以真实地模拟出导弹等飞行器在空间的各种姿态和动力学特性，从而对其传感器件、控制系统和执行机构等硬件设备的性能加以测试和评价，为飞行器的研制、改进和再设计提供各种参考依据。

In the present study,we intend to establish a new model of traumatic brain-steminjury,and to study the pathological changes of neuron,axon,astrocyte,plasmaproteins,blood vessel endothelia,synapse,neurotransmitter and cytokines in rat'sand human injured brain-stem,using routing histochemistry,immunohistochemistry,in situ hybridization,LSCM and computerized image analysis.

综合现有文献，本研究拟建立新的脑干损伤动物模型，并采用常规病理组化、免疫组化、原位杂交、LSCM以及计算机图像分析等技术，对动物及人体脑干组织中的神经元、星形胶质细胞、血浆蛋白及血管内皮细胞，以及轴索、突触、神经递质及细胞因子等进行研究，并对脑干损伤的致死性病变进行初步定位，以确立对脑干损伤的鉴定和推断脑干损伤时间有意义的客观指标。

The single mechanical seals of five PHP pumps, nine PLA pumps, two THD pumps and nine ZA pumps in the acetic acid plant were changed into dual mechanical seals based on not changing main parts such as casing, impeller, shaft, bearings house etc. to solve the leakage problems of flammable, explosive, poisonous, harmful substances, such as acetic acid, methyl iodide, hydroiodic acid, and propionic acid etc.

通过对醋酸装置中所选用的5台PHP型、9台PLA型、2台THD型及9台ZA型单级卧式脚支撑化工离心泵，在不改变泵壳、叶轮、轴、轴承箱等主要部件的基础上，将原来的单端面机械密封改造为双端面机械密封或串联式机械密封，以此来防止所输送的易燃、易爆、有毒、有害高危介质（如醋酸、碘甲烷、碘化氢、丙酸等）外漏。

It may repair the wearing parts to right size, mainly applied in engine cranks、 shell place hole、kinds of axle and pin of the automobile、tractor and as well as on the large-scale grips of mining machinery.

可以修复磨损零件的使用尺寸，主要应用于汽车、拖拉机等发动机曲轴、壳体座孔、各种轴、销以及采矿机械上的大型扎件等机械零件的修复。

The computation analysis indicates that increasing the aperture of the concave focusing transducer, decreasing it's geometric focal length or raising it's central working frequency can improve the transverse and axial resolutions of the system simultaneously, but changing the dividing proportion of the transducer affects the two kinds of resolution differently. On compromisingly considering several factors including the exciting mode, the focusing ability and the radiation force effect, the concave focusing transducer should be divided into two equal-area parts.

计算研究表明：增大凹球面换能器的口径、减小几何焦距和提高中心频率均可以提高系统的侧向分辨率和轴向分辨率；但改变凹球面换能器的分割比例对两种分辨率影响不尽相同综合考虑超声换能器激励、聚焦性能以及产生的辐射力效果等因素，则换能器应按等辐射面积原则分割为宜。

Due to high-quality requirements of scientific exploration well,long open-hole,long coring footage,and frequently changing lithology,the length of inner tube shoe was increased,the surface slippy degree between core catcher and inner tube sh...

针对科学探井对岩心质量要求高及该井裸眼井段长、取心进尺长、地层岩性变化频繁、取心施工难度较大等问题，采取加长刻刀座轴向长度，增加岩心爪与刻刀座表面光滑度，优选取心钻头，调整钻井液性能和选择配伍性好的钻头与刻刀座、合理的钻进参数等措施，保证了定向取心收获率，取心累计进尺103.66 m，收获率99.85%，为科学研究提供了可靠的岩心资料。

Groupindustrial zone is situated in the junction of Jing-Guang-Jiu railway,Changping Town ,Dongguan,the factory covers an area of 22,000m or so,it is equipped with lots of automatic equipment processing parts imported from developed conutries Japan's four-axis CNC lathe ,full-automatic laser cutter used for sheet metal,numerically controlled plate cutter,numrically controlled punch,plate-bending machine,automatic sheet metal coating production line,etc,it now fromulates annual production capability of more than 3,000 units.

集团工业园位于京广-九铁路交汇点东莞市常平镇，三年区占地面积22000余平方，拥有大批欧\美\日等国家先进的自动化设备加零件，如：电脑数控立，卧式CNC加工中心群，日本四轴CNC车床，板金使用的全自动化激光切割机、数控剪板机、数控衡床，弯板机、自动化板金喷涂生产线等。现已形成年产量3000多台的生产能力。

Groupindustrial zone is situated in the junction of Jing-Guang-Jiu railway,Changping Town ,Dongguan,the factory covers an area of 22,000m or so,it is equipped with lots of automatic equipment processing parts imported from developed conutries Japans four-axis CNC lathe ,full-automatic laser cutter used for sheet metal,numerically controlled plate cutter,numrically controlled punch,plate-bending machine,automatic sheet metal coating production line,etc,it now fromulates annual production capability of more than 3,000 units.

集团工业园位于京广-九铁路交汇点东莞市常平镇，三年区占地面积22000余平方，拥有大批欧\美\日等国家先进的自动化设备加零件，如：电脑数控立，卧式CNC加工中心群，日本四轴CNC车床，板金使用的全自动化激光切割机、数控剪板机、数控衡床，弯板机、自动化板金喷涂生产线等。现已形成年产量3000多台的生产能力。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。