1. <table id="o2qju"></table>
      <rt id="o2qju"></rt>

      <ruby id="o2qju"><noscript id="o2qju"></noscript></ruby>
      <wbr id="o2qju"></wbr>

      1. 亚洲爆乳精品无码,大地资源中文第二页在线观看 ,伊人久久精品99,超碰97久久国产人人澡,国产真实老熟女无套内射,国产色无码网站无码视频在线,大地资源在线观看中文第二页,午夜性刺激在线观看

        常熟國強和茂管材有限公司

        Sinupower Heat Transfer Tubes Changshu Ltd.
        CN EN

        400-100-7068

        + 微信號:WEIXINHAOMA

        Your location : Home > News > Company Dynamics

        Main standard and material of precision bright tubes

        Source:en      Release date: 2022-05-17
        Information summary:Because the precision bright tube is a kind of high-precision steel pipe material that has been processed by fine drawing or cold rolling, because the precision bright tube has no oxide layer on the inner and outer walls, it can withstand high pressure without leakage, high precision, high finish, and no cold bending. Deformation, flaring, flattening without cracks, etc.
        Because the precision bright tube is a kind of high-precision steel pipe material that has been processed by fine drawing or cold rolling, because the inner and outer walls of the precision bright tube have no oxide layer, it can withstand high pressure without leakage, high precision, high finish, no deformation after cold bending, expansion It is mainly used to produce pneumatic or hydraulic components, such as air cylinders or oil cylinders, which can be seamless tubes or welded tubes. The chemical composition of precision bright tubes is carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, chromium Cr.
           Main standards: GB/T3639, DIN2391-94/C, DIN2445, EN10305, DIN1630, DIN1629, ASTM A106, ASTM A179, JIS G3445.
           Main materials: 10#, 20#, 35, 45, 40Cr, 25Mn, 37Mn5, St35(E235), St37.4, St45(E255), St52(E355).
           The main purpose of the precision bright tube: automobiles, machinery parts and other machinery that have high requirements on the accuracy and smoothness of the steel tube. In 2--8 wires, many machining users are slowly converting seamless steel pipes or round steels into precision bright pipes in order to save labor, material and time losses.
        主站蜘蛛池模板: 一级 片内射视频播放| 日本特黄一级aa大片24免费| 骚虎视频在线观看| 精品久久久久久久中文字幕| 久久精品人人看人人爽| 男男啪啪激烈高潮cc漫画免费| 北条麻妃国产九九九精品视频| 国产精品无码无需播放器| 在线天堂av影院| 国产高清无码在线视频| 亚洲一区二区三区| 久久久天天天天性色综合网| 久久精品女人天堂av| 亚洲成Av人片乱码色午夜在线| 亚洲AV无码乱码国产精品FC2| 国产精品一级18一级毛片| 丹巴县| 国产精品久久久久aaaa| 亚洲日韩看片无码超清| 色噜噜狠狠狠狠色综合久一| 99久久久国产精品免费调教| 五月天免费中文字幕av| 香蕉久久精品曰曰躁夜夜躁| 99视频69e精品视频二三区 | 亚洲国产精品无码久久青草| 亚洲精品国产中文字幕| 精品久久伊人99热超碰| 无码三级中文字幕在线视频| 东京热无码中文字幕视频| 欧美精品国产精品| 亚洲精品自在自线更新| 国产性爱无码高清视频| 国产欧美日韩在线中文一区| 成全在线观看免费高清电视剧| 午夜通通国产精品福利| 国产成人无码AⅤ片在线观看| 亚洲自偷自偷偷色无码中文| 靖远县| 日韩人妻无码精品二专区| 俄罗斯6一9泑女| 亚洲第一视频区|