国产剧情AV麻豆香蕉精品,国产女人A级毛片18视频,人妻丰满熟人熟妇av无码,久久99国产精品9床震网站

          Language:CHINESESENGLISH

          Home > News > Guangzhou Steel News: seamless steel pipe joints straight substitution can not do in order to
          CONTACT US
          • Address:Pingtang Industrial District, Shipeng Village, Shishan Town, Nanhai District, Foshan City,
          • Phone:0757-81002668/0757-63323396
          • Fax:0757-81196682
          • Contact:Ben Zheng/13826981293 Kerry Lu/13751224830
          • E-mail:sbs@sbsprefabhouse.com
          • URL:http://www.creadir.com

          Guangzhou Steel News: seamless steel pipe joints straight substitution can not do in order to

          Time:[2015-8-26]  Hits:4334

          Guangzhou Steel News: seamless steel pipe joints straight substitution can not do in order to

          Structural steel in theory, should be the same, the difference is not great, as good as seamless Longitudinal rules pipe centroid might not in the center, so when used as a compression member with particular attention, defective weld pipe the probability is relatively high, an important part of not substitute seamless pipe, seamless pipe wall thickness is limited processing do not do very thin (seamless pipe thickness than the average thickness of the same diameter), in many cases seamless pipe material use efficiency is better, especially the large-diameter pipe.
          The biggest difference is seamless and welded pipe used in gas or liquid pressure transmission (DN). Guangzhou Steel

          Copyright:佛山市勝邦鋼結構有限公司 Foshan Shengbang Steel Structure Co., Ltd. Record Number:粵ICP備13078463號