积极的区别对待 positivediscrimination 区别对待措施differential measure 区别对待，有保有压 the principle of taking different approaches to different situations and encouraging the growth of so...
Measure and record the differential pressure across the valve using a Watts Series PG meter. CAUTION: Safety glasses should be used.
采用美国瓦茨系列PG仪器测量和记录通过阀门的压差。警告：应该使用安全眼镜。
2
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。
3
The general guideline for deciding which measurement system to pick is to measure grounded signal sources with a differential or NRSE system, and floating sources with an RSE system.