master meter meaning in English

标准仪表，基准电表
基准仪表
主表

In this paper , the theory of master meter method for verification of super - large diameter flowmeter is discussed and the principle of error correction of the master flowmeter is analysed , so as to get the right way of calibrating super - large diameter electromagnetic flowmeter by the master meter method
本文讨论了用标准表法检定特大口径流量计的原理，分析了标准流量计的误差修正,以期找到一种用标准表法检定特大口径电磁流量计的理想方法。