查询词典 safety glasses

And then the effects of compositions on the mechanical performance, characteristic temperatures, thermal expansion and chemical stability of the glass were discussed. Researches on lead borate sealing glasses show that PbO/B2O3 ratio exerts the most important effect on glass network. ZnO is beneficial to stabilize the glass against devitrification . Bi2O3 has little effects on the sealing temperature, while it helps to adjust the thermal expansion coefficient of lead borate glasses in a definitive range. When 0.5～4 mol% GeO2 is introduced, the glass possesses the highest stability and lowest sealing temperature (400 ?C), which is desirable for low-temperature sealing.

通过对含铅的硼酸盐封接玻璃研究得出，PbO/B2O3比是影响玻璃网络最主要的因素；添加ZnO有助于增强玻璃的稳定性，抑制析晶；Bi2O3对高铅系列配方玻璃的封接温度影响不大，但可使铅硼系列玻璃体系的热膨胀系数在一定范围内可调；在高铅系列配方中，引入0.5～4mol%的GeO2可有效地抑制玻璃析晶，降低封接温度；最终获得了两种性能较好的低熔点铅硼酸盐封接玻璃配方，G3封接温度低达400℃，其PbO含量为54mol%左右，BL10玻璃的封接温度为440℃，但其铅含量大大降低，仅为36mol%。

Do an optical shop on the street with casual computer optometry glasses, because it had not been dilated, we can not completely accurate test out the eyes of the dioptre number, they still do not find it troublesome to go to a regular hospital to meet the appropriate eye glasses.

不要在街道上的眼镜店随便电脑验光配眼镜，因为没有经过散瞳，是不能完全准确的测试出眼睛的屈光度数的，所以还是不要嫌麻烦要去正规的眼科医院去配合适的眼镜。

Then I said if I had my eye glasses I could prababaly see beetter I usually ware my eye-glasses in the movies or to watch TV but I side maybe they will help me see the pictures in the ink.

於是我说"也许你给我我的眼镜的话，我能看得清楚一些，因为我经常带著眼睛去看电影，或者看电视，所以眼镜会帮我找到墨迹里的图片吧"带上了眼睛后，我说"好，那让我再来看看，我想我可以找到它们了"

An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by both eyes and consisting of two small telescopes joined with a single focusing device.

双目镜由两个小望远镜和一个调焦设备组成的光学设备，如一副双筒望远镜或观剧用的小望远镜，设计为同时用双眼观看。

In this paper the sgnificant development of optical glasses and their applications in the fields of optics and information technology are introduced. The development trend and the characteristics of the main optical functional glasses such as nonlinear opticl glass, gradient index glass, laser glass and other optical function glass are pointed out.

本文针对光学玻璃及其在光学和信息技术等相关应用领域的重要性和发展作了介绍，重点阐述了非线性光学玻璃、梯度折射率光学玻璃、激光玻璃以及其他光功能玻璃的主要特性和发展状况，并对我国的光学玻璃工业发展作了回顾。

If your optician decides that you may need to wear glasses or contact lenses, you will need to take further tests to work out exactly what kind of glasses you need.

如果您的配镜决定，您可能需要配戴眼镜或隐形眼镜，您将需要采取进一步的测试工作，到底什么样的眼镜，您所需要的。

There were only three glasses; the water was so dirty that there was no telling whether the tea were strong or weak, and the samovar would only hold water enough for six glasses. But that made it all the more fun to take turns in order of seniority to receive a glass from the plump, short-nailed, and not over clean fingers of Marya Hendrihovna.

只有三只杯子，水脏得看不清茶浓还是不浓，而茶炊里只有六杯水，但是这样却更令人高兴：按年龄大小依次从玛丽亚·亨里霍夫娜不太干净的留着短指甲的小胖手里接过茶杯。

It's because those glasses don't look right on your face, you have a long face and those glasses make you look shifty.

因为那副眼镜和你的脸根本就不合适，你有一张长脸和可是那副眼镜会把你改变了。

Mr Jones: No, no -I mean glasses for the eyes: sun-glasses, and so on.

琼斯先生：不，不━我的意思是戴在眼睛上的眼镜：太阳眼镜，等等。

A customer buys a pair of sun-glasses in a glasses store.

一位顾客在一家眼镜店买了一副太阳镜。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。