Home / Standards / GB 11449.5-89 GB 11449.5-89 Waveguide Flanges — Part 6: Specification for Flanges for Medium Flat Rectangular Waveguides 波导法兰盘 第6部分:中等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