美利体育登录入口官网:GOST R IEC 61094-2-2001 测量一致性确认用国家体系.测量扩音器.用互易技术对实验室标准扩音器进行压力校准的基本方法
State system for ensuring the uniformity of measurements. Measurement microphones. Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique