ISO 12242:2012 EN a1a20f10
Measurement of fluid flow in closed conduits — Ultrasonic transit-time meters for liquid
现行
发布日期 :
2012-07-03
实施日期 :
ISO/TR 9824-2:1990 EN 05937c2f
Measurement of free surface flow in closed conduits — Part 2: Equipment
废止
发布日期 :
1990-05-10
实施日期 :