Minimize drift of the instrument during prolonged operation.

在长期操作中，使仪表的误差减至最小。

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Fixed chokes do not provide this flexibility, although they are more resistant to erosion under prolonged operation or production of abrasive fluids.

固定节流器不能提供这种灵活性，不过它们在长时间的工作下或生产磨蚀性流体的情况下更能抗冲蚀。

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The overlap of 4 hours now between HKSE's operation and A-share trading will be prolonged to 5 hours on March 7, 2011.

港交所将延长与A股重叠交易时间3月7日，港交所将延长与A股重叠交易时间，交易时段由现在的4小时延长至5小时。

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The horse underwent surgery again 24 hours after a prolonged operation to remove a blockage of the small intestine.

BBC: Goodbye Millennium

That period in the 1930s where a prolonged Depression precipitated the high-speed collapse of trade, currency arrangements and international co-operation.

BBC: Euro: A 'loose cannon on the deck of the world'?

Some women also believe, that it is better to avoid a possibly prolonged labour, and the ongoing discomfort of damage caused by the birthing process by having a planned operation instead.

BBC: Big rise in Caesarean births