N a link or rod transmitting power between two rotating mechanisms or a rotating part and a reciprocating part 耦合器
I am concerned about the bars welded across the couplers.
我担心的是焊在连接器上的横栏。
Directional Couplers are four-port networks and fairly difficult to design.
定向耦合器是四端口网络，直接设计十分困难。
An inconvenience of prism couplers is that the prism material must have a high refractive index.
棱镜耦合器的一个不方便的地方是棱镜材料必须有较高的折射率。
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