This paper explained the work theory and the process of design about the parallel coupled line directional coupler.
阐述了平行耦合线定向耦合器的工作原理和设计过程。
The construction of concentric bi-directional valve overcomes the disadvantage of easy to connect between two parallel check valves.
同心双向阀结构克服了传统的单向阀并联结构两阀间易连通的缺点。
In this paper, a new structural cleaning bench, double directional and horizontal parallel flow cleaning bench, is presented.
本文提出了一种新型结构的净化工作台——双向出风水平层流净化工作台。
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