久久精品日日躁夜夜躁欧美,亚洲日韩片无码中文字幕,亚洲欧美日韩在线一区,亚洲综合最新无码专区

GB/T 699 優(yōu)質(zhì)碳素結(jié)構(gòu)鋼標(biāo)準(zhǔn)中文版下載

GB/T 699 優(yōu)質(zhì)碳素結(jié)構(gòu)鋼標(biāo)準(zhǔn)英文版下載

Trade Standards of the People's Republic of China

中華人民共和國國家標(biāo)準(zhǔn)

Quality Carbon Structural Steels

優(yōu) 質(zhì) 碳 素 結(jié) 構(gòu) 鋼

Issued on 1 Nov. 1999          Executed since 1 Aug. 2000

1999-11-01發(fā)布                            2000-08-01實施

Issued by the State BUREAU OF QUALITY TECHNICAL SUPERVISION    Burea

	? 請關(guān)注 微信公眾號: steeltuber.  轉(zhuǎn)載請保留鏈接: http://www.bjjrgk.com/Download/GB-T-699-high-quality-carbon-structural-steel-standard-download.html