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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We also took a look at the BP's first massive oil containment dome, which the company plans to lower 5, 000 feet below the sea to plug up the leak.

ENGADGET: Inhabitat's Week in Green: salad spinners, diapers, and solutions to the Deepwater catastrophe