黄鹤楼回复于2007/09/05
ASTM A500-03a 圆形与异型焊接与无缝碳素钢结构管: http://www.instrument.com.cn/show/download/shtml/052872.shtml
ASTM A688/A688M-03 焊接的奥氏体不锈钢给水加热器管: http://www.instrument.com.cn/show/download/shtml/052871.shtml
ASTM A29 A29M-04 热锻及冷加工碳素钢和合金钢棒: http://www.instrument.com.cn/show/download/shtml/052873.shtml