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1 概述1 1 测量依据ＪＪＧ 5 9- 1990二、三等标准活塞式压力计检定规程 ;ＪＪＧ 2 39- 1994二、三等标准活塞式压力真空计检定规程 ;ＪＪＧ 15 9- 1994二、三等标准双活塞式压力真空计检定规程。1 2 测量标准一等标准活塞式压力计。1 3 测量对象二等标准活塞式压力计、
1 Overview 1 1 Measurement based on JJG 5 9- 1990 Second and third class standards for piston gauge verification procedures; JJG 2 39- 1994 second and third class standards piston pressure gauge test procedures; JJG 15 9- 1994 second and third class Standard double piston pressure vacuum gauge verification procedures. 1 2 Measurement standards First-class standard piston gauge. 1 3 Measuring object Second-class standard piston gauge,