Home / Standards / GB 11449.3-89 GB 11449.3-89 Waveguide Flanges — Part 3: Specification for Flat Rectangular Waveguide Flanges 波导法兰盘 第3部分:扁矩形波导法兰盘规范 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A