IEC 61842:2002 EN 82c3fa94
Microphones and earphones for speech communications
现行
发布日期 :
2002-03-08
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 :
IEC 62127-3:2007 EN_D 5907db2a
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 :