Bell gages may be used to measure gage pressure or differential pressure.

浮钟式压力计可以用来测量计示压力或差压力。

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Meanwhile, a sand discriminant criteria specific for area deep gas reservoir is established on the basis of sand index, the critical production bell Aaron and the critical pressure parameters.

同时，建立了工区深气层出砂指数、斯伦贝尔比和临界生产压差等参数的临界出砂判别标准。

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PMI's are a great bell-weather for the overall health of the economy, so data in Europe does not look good and is unlikely to lift pressure on the euro right now.

采购经理人指数是经济整体健康程度的晴雨表，所以，欧洲各个数据不佳，且不大可能减轻欧元目前承受的向下压力。

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Ian Bell, under pressure from Shah for a place in the opening Test in Jamaica, was caught for 36 after he drove hard at Willett's second delivery of the day.

BBC: Pietersen smashes England century

Bell is also under pressure after scores of eight and three at Headingley.

BBC: England quintet face county stint

Bell, who was under pressure going into the match, struck 78 from 213 balls as England survived a tense finale.

BBC: Ball-tampering row angers Strauss despite draw