The article describes the close relation between electric traction drive and power electronic devices that improve and rely on one another.

阐述电力牵引传动与电力电子器件相互促进和相互依存的密切关系。

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However in response, Netflix says Amazon and Hulu Plus have yet to gain meaningful traction in relation to its viewing hours, and it expects Redbox Instant to face a "big challenge" to break into the existing top 3.

ENGADGET: Netflix Q2 2012 earnings: 530,000 more US subscribers and a return to profitability