The sealing structure and principle of hollow metal O-ring was introduced.
介绍了金属空心o形圈的密封结构和密封机理。
Now, however, compassion is out of fashion — indeed, lack of compassion has become a matter of principle, at least among the G. O. P. 's base.
然而如今，同情已经过时了——甚至，缺乏同情已经成一个原则问题，至少在共和党的大本营是如此。
The paper describes the scheme, detecting principle and method, and the real construction o...
文章对该装置的方案设想、测试原理和方法、实际构与接线进行了详细描述。
The paper describes the scheme, detecting principle and method, and the real construction o...
文章对该装置的方案设想、测试原理和方法、实际构与接线进行了详细描述。
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