?????????????
????????
???????????????й??????????????????????????????????ASTM??ASME????????JISS????????DIN????????BS????????? IO????????EN ???????????????????????????????????и???????????????????????????????8-600mm???4.5m ??????18m????????????????? ?????????????????????m??0.5mm????????100mm???8mm?????γ???1mm???и??????? 100mm?12.5????100mm?25???и??????????????
???????????????
60*2200*7000 75??
50*4030*555 98??
70*2200*9500 32??
80*2200*8000 56??
6??1800??8000 98??
?人??????325*40??q420qc??????????г????????????
