Seal using novel double-end mechanical seal structure.

轴封采用新颖的双端面机械密封结构形式。

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A measurement amplifier circuit is designed, which consists of circuits of differential amplifier, a common-mode rejection, double-end and single-end conversions and programmed gain amplifier.

设计了一个测量放大器电路，它由差动放大电路、共模抑制电路、双端单端转换电路和程控增益放大电路组成。

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First, you can mix single and double quotation marks when creating a string, as long as the string USES the same type of quotation mark at the beginning and end.

第一，在创建字符串时，您可以混合使用单引号和双引号，只要字符串在开始位置和结束位置使用同一类型的引号。

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Now 3 million of its customers have broadband, and that should double by year-end, then reach 18 million by 2010.

FORBES: Magazine Article

Venus Williams took advantage of Cornet's double-fault to end the first set.

NPR: Djokovic, Sharapova Cruise At Aussie Open

In November, Assembly members failed to agree on an Ulster Unionist motion to end double-jobbing by 2011.

BBC: Double payments to end for NI MPs who are MLAs