state class d
国家d级
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The Hitachi Sound Bars feature four high efficiency full range speakers and two high frequency tweeters with state-of-the-art Class D digital amplifiers.
ENGADGET: Hitachi intros UltraVision LED TVs with Roku-ready HDMI, freshens Value TVs and sound bars for the fall
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