expounded in this paper are the development process, main technical parameters, structure, performance features and testing of the removable roof box cars.

1、

development of the push-pull type removable roof box cars

推拉式活顶棚车的研制

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2、

through the research and expatiation of data collection, processing and com-plex surface construction during the reverse process of the car frontal out-cover, the ap-plication of reverse technology in the car cover parts cad design was realized.

通过对客车前侧围外板实物反求过程中的数据采集和数据处理以及曲面构造等关键过程的研究和阐述，实现了反求技术在汽车覆盖件CAD设计中的应用。

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3、

at what average speed in kilometers per hour would this car need to cover the same distance in minutes?

在几分钟内这辆车行驶同样距离需要的平均时速是多少？

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4、

hood is an important car body cover.

发动机罩是车身外覆盖件中的重要部件。

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5、

the rapid design and rapid manufacture of a car lamp cover

车灯后盖产品的快速设计与快速制造

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6、

and take a car cover hood which is used to mark the type of the car as an example to describe how the flexible fixture is used in the field of precision measurement for the car components coordinate.

以标志某车型发动机罩盖为例，阐述柔性夹具在轿车零部件三坐标精密测量领域的一种应用方式。

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7、

a look at stamping die design for domestic and foreign car cover panels

国内外轿车覆盖件冲压模具设计概览

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8、

drawing die design of small curvature car cover panel

小曲率轿车覆盖件拉深模设计

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9、

oh, looks like my old car cover.

看上去是我的旧车罩啊

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10、

the application of product reverse technology in the car cover parts designing

实物反求技术在汽车覆盖件设计中的应用

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11、

he replied, "it has a lifetime warranty."

他回答说，“这种棺材终生保修。

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12、

this product comes with lifetime warranty. books do not last forever.

这件产品有永久保证。

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13、

they feature open architecture format control and carry a lifetime warranty.

他们以开放结构的格式控制和终身保质为特点。

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14、

we wish all drives to carry a lifetime warranty and to be cap-less.

我们希望所有驱动器进行终身保修和帽。

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15、

he turns out a number one quality rod, for a very reasonable price that has a lifetime warranty.

他打开了多项质量一杆，一个非常合理的价格，具有终身保修。

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16、

this kind of relief valve is reliable in action, low in cost and free of maintenance, another advantage is that it has wide scope of application for it has not power device therefore it is not interfered, while working, by any intelligent instrument.

这种泄压阀动作可靠、价廉、免维修，由于无动力装置，工作时不受智能仪表干预，所以使用范围比较广泛。

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17、

in contrast, application based on b/ s model has the advantage of cross-platform, free client maintenance, etc, so more and more applications based on c/ s gradually migrate to the web platform.

相比之下，基于B/S模式的应用具有跨平台、免客户端维护等优点，因此越来越多的C/S应用逐渐迁移到web平台上来。

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18、

both pneumatic pulsed liquid jet pump and vortex diode pump are two new types of radioactive liquor transfer systems used in nuclear industry, where the prevention from leakage and free of maintenance are required.

气动式脉冲液体射流泵和涡流二极管泵是两种新型的核用放射性溶液输送装置。最后，我们还对脉冲液体射流泵和涡流二极管泵联用装置的性能进行了初步的实验研究。

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19、

high accuracy, erosion and wear resistance strong anti-tremor, free of maintenance, long service life no electric sparks, safe and trustiness, convenient installation.

精度高，耐腐蚀及磨损；抗震性强，免维护，使用寿命长；不起电火花，安全可靠，安装方便。

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20、

vibration characteristics of high speed railway's bridge-subgrade transition section segmental bridges when properly designed will prove to be practically free of maintenance for many years.

高速铁路路桥过渡段振动特性试验研究分段桥梁经过适当设计可以多年不需要养护。

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