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??????????0.2??
?е????????????????????????????????????????????????????????????涨???????ò?????????ε???????????????????0.2???????????????????????????????????0.2 ??
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???????????????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??????????????
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???????????10?????????????????????210.68????????????-1??????????г????????????????????????????ó?????????????????????????????????10?·????????????????????????????????????210????????
???12??19????????18*1600*C??Q420q?????????????????
