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。
2
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。
3
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.