2012-6-26
【鋼吊車(chē)梁和牛腿焊接依據(jù)是設(shè)計(jì)規(guī)范哪一條】想請(qǐng)教一個(gè)問(wèn)題:鋼吊車(chē)梁和牛腿焊接依據(jù)是設(shè)計(jì)規(guī)范哪一條