IEC 60645-3:2007 EN-FR 694c769c
Electroacoustics - Audiometric equipment - Part 3: Test signals of short duration
REVISED
发布日期 :
2007-03-20
实施日期 :
IEC 62127-3:2007 EN-FR 3481af70
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz
REVISED
发布日期 :
2007-08-23
实施日期 :