|
60| 0
|
SJZ 9147-1987 采用互易技术对φ23.77mm标准电容传声器进行声压校准的精密方法 |
| ||
|站长QQ:22646427|Archiver|手机版|小黑屋|查规范网
( 粤ICP备2024184902号-1 )|网站地图
GMT+8, 2025-12-9 09:36 , Processed in 0.151479 second(s), 42 queries .
Powered by Discuz! X3.5
© 2001-2025 Discuz! Team.