关于purlin的百科

• purlin造句怎么写

• 1、Theroofsystemconsistsofmainpurlin,bottomplate,secondarypurlin,absorptionsoundlayer,insulatinglayerandfaceplate.2、Thepaperpresentsstaticanddynamicanalysisofsteel-structurefactorywithsteelpurlinroofandfactorywithroofwithoutpurlin.3、Isapurewoodenar...
• 2024-01-2830371