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The principle of determination of sound absorption coefficient of materials by transfer function method is introduced.

介绍了在阻抗管中采用传递函数法测量材料吸声系数的原理，详细介绍了使用双传声器进行测量的方法，指出了测试的频率范围取决于阻抗管的管径大小和传声器布置的位置。

The flow and performance characteristics of ice storage tank air conditioning system with multi evaporators were analyzed.

分析了多室内蒸发器的冰蓄冷柜式空调系统的流程和性能优点，建立了蓄冰槽充冷过程的数学物理模型，对换热管的每一个管段，根据热阻网络建立了描述其换热过程的差分方程组。

The distribution of the liquid film was got, and the effects of helix angle, geometry of the channel, liquid mixing and liquid properties on the liquid film was also studied.

考虑表面张力和重力的作用，利用流体力学的基本方程建立单组分流体在水平螺旋槽管的管壁形成液膜的拟线性模型 3。

The performance of radar's klystron affects directly the quality of radar echoes and operating cost, so the proper use and maintenance of klystrons are paid increasing attention presently.

雷达速调管的性能直接影响到雷达探测的回波质量及操作成本，因此速调管的使用维护也日益受到人们的重视。

A seal for sealing against a cylindrical surface, for example the facing surfaces of two concentric pipes, or the facing surfaces of a pipe and a plug or cap, is actuated by a series of elongate shape-memory material actuators (40) which are arranged around the cylindrical surface.

一种用于密封在一圆柱形表面上的密封装置，所述圆柱形表面例如是两个同心管的相对面，或一个管和一个插塞或盖的相对面，所述装置由一系列细长的形状记忆材料致动件(40)致动，致动件围绕圆柱形表面设置。

Harpsichord羽管键琴】A stringed instrument resembling agrand piano but usually having two keyboards and two or more strings for each note and producing tones by the plucking of strings with plectra.

一种卧式竖琴型或梯形的键盘乐器，类似三角学钢琴，但通常有两层键盘(部门为一层，及其个别亦有三层)和两套或更多的弦(每一套发出差别音质的音)，通过羽管或皮制拨子(拨子连接一顶重器，一般为一根直立的木杆)拨弦，赖琴键内端推动发声。

The invention is suitable for pipe shell type heat exchanger, better heat transfer effect can be achieved by adopting the arrangement method for heat transfer pipe according to the invention, and heat exchanger having different temperature difference of intake water and outtake water can be conveniently combined.

本发明适用于管壳式换热器，在换热装置中采用本发明的传热管的排列方法，可以达到较好的传热效果，而且可以方便地组合成不同进、出水温差的换热器。

The trap has an inlet through which particles in the process are introduced into the trap, and the collection line penetrates a portion of the exhaust conduit to extend toward an outside region of the exhaust conduit.

该捕集器具有该处理中的颗粒被引入该捕集器的入口，而且该收集线路穿透该排出管的一部分，以向着该排出管的外部区域延伸。

In design step, the safety of color picture tube should be paid more attention to. And the protection system, e.g. rimband etc.,in the requirement of safety is also very strict.

彩管的安全在设计阶段首先就要被重视，而彩管的保护系统———防爆带等的要求也是十分严格的。

Tween the main tube and the branch tube is machine path of main tube and branch tube winding filament trajectories consisting ot geodesics and non-geodesics on And the way how to select winding angle in the intersection bepresented.

针对两圆柱直接相贯的三通管，利用圆柱面上的测地线和非测地线实现了圆柱部分的纤维缠绕路径设计，并给出了纤维从主管顺利过渡到支管的条件。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。