GB/T 18591-2001焊接 预热温度、道间温度及预热维持温度的测量指南Welding--Guidance on the masurement of preheating temperature,interpass temperature and preheat maintenance temperature
ETSI TR 126 954-2017 LTE; Test plan for speech quality and delay through a headset electrical interface (V14.0.0; 3GPP TR 26.954 version 14.0.0 Release 14)