Constant orifice differential pressure is the premise for high accuracy hydraulic measuring, so thorough analyse of orifice differential pressure control technology has been taken.
阀口压差的稳定是高精度液动测量的保证，因此深入研究了阀口压差控制技术。
Because of the dual-orifice design, there is a preset controlled pressure differential for the secondary steam system, while maximum pressure differential is available to discharge the condensate.
由于采用了双阀孔结构设计，在最大压差下排放凝结水的同时，还有一个为二次蒸汽系统设计的预设压差系统在工作。
The metering of natural gas still presently depends on orifice flowmeter, one of differential pressure flowmeters.
天然气计量现在仍以差压式流量计中的孔板流量计为主。
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