WW H 171 Revision E Amendment 1被替代
Hangers & Supports, Pipe (For Dod Use - Ansi/Mss-Sp-58, Ansi/Mss-Sp-69, Nfpa 11, 12, 13, 14, 15, 16 & 17 - Revision E Amendment 1
出版：US Military Specs/Standards/Handbooks
专家解读视频
