... concentric orifice 同心锐孔板 concentric piston ring 同心式活塞环 concentric plug 同心插头 ...
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concentric plug-and-socket [电] 同轴插头和插座
The same catalogue included a type of two-pole concentric plug and socket.
相同的目录包括一种两极同心插头和插座。
The Vifa XT25TG30-04 1" Dual Concentric Dome Tweeter features a patented dual concentric diaphragm and a unique wave guide center plug which provides an excellent on and off axis response."
该威发xt25tg30 - 04 1 “双同心圆顶音单元的特点获得专利的双同心膈肌和独特的波导中心堵塞，其中提供了一个很好的上落轴的回应。
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