標(biāo)題: ASTM A 500-2003 圓形與異型焊接與無縫碳素鋼結(jié)構(gòu)管 [打印本頁] 作者: 兌水 時(shí)間: 2009-9-7 08:50 標(biāo)題: ASTM A 500-2003 圓形與異型焊接與無縫碳素鋼結(jié)構(gòu)管 A500-03a Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes