Q BQB 329-2012(2014) 焊接气瓶用热连轧钢板及钢带.pdf

Q/BQB329－2012（2014）代替Q/BQB329－2009焊接气瓶用热连轧钢板及钢带Continuouslyhot-rolledsteelstripforweldedgascylinders2012-05-10...