标签:s355nl,s355n+n,s355k2,s355j2+n,s355j0+n,s355jr+n,s275n s275nl,s275j2+n,s275j0+n,s275jr+n,s235j2+n,s235jr+n,s235j0+n
2016-07-22
s235jr+n s235j0+n s235j2+n s275jr+n s275j0+n s275j2+n s275n s275nl s355jr+n s355j0+n s355j2+n s355k2 s355n+n s355nl s355j2+n 简介 s开头的是碳钢结构钢,后面的355是指室温条件下的最低屈服强度是355mpa。j2则要求...