日韩福利片午夜免费观着,gv天堂gv无码男同在线观看,无码激情亚洲一区,亚洲日本va中文字幕亚洲,日本无码人妻丰满熟妇区,国产男生午夜福利免费网站,性色欲情网站iwww九文堂 ,97色成人综合网站
    Service Hotline
    086-577-86923687
    Current Location:Home - News - Products Knowledge
    Comparison Process head cold and hot processing
    Release Time:2011-10-26  Views :
    Processing head is generally divided into cold and hot working are two, compare the following three aspects of the two paper processing head were:
     
    A, head cold material deterioration does not occur, especially suitable for processing stainless steel head;
    Thermal processing material deterioration will occur, resulting in decreased corrosion resistance of stainless steel head, stainless steel head is not suitable for processing.
    B, cold will not change the size of the contraction caused by cooling, regular shape, size, accuracy and consistency;
    Hot forming mold can cause thermal expansion and contraction of the cooling head, the size difference is difficult to control and consistency.
    C, to maintain the surface after head cold forming smooth surface of the original material, beautiful appearance.
    Surface oxide formed after thermal processing head of serious and difficult to remove.
    Key Words : 不銹鋼封頭
    Products
    Elliptical head
    Elliptical head
    Butterfly head
    Butterfly head
    Spherical head spin edge
    Spherical head spin edge
    Flat Head
    Flat Head
    Spherical head
    Spherical head
    Bow bottom head
    Bow bottom head
    Conical head
    Conical head
    Spherical cap shaped head
    Spherical cap shaped head
    Insulation panel
    Insulation panel
    Expansion Joints
    Expansion Joints
    Jacket (cylinder) rotation side
    Jacket (cylinder) rotation side
    Manhole flange
    Manhole flange
    NAVIGATION
    Wenzhou Shangshang Metal Products Co., Ltd.
    Add : 208,Zhanhong Road,Dushan,Longwan CentralIndustry,Wenzhou
    Tel : 086-577-86923687 85981288  Fax : 086-577-86913687
    All Rights Reserved © 2016 Wenzhou Shangshang Metal Products Co., Ltd    Zhejiang ICP No. 08,005,782
    • Follow Us

      Follow Us

    主站蜘蛛池模板: 肉体暴力强伦轩在线播放| 亚洲啪啪av无码片| 亚洲第一男人天堂| 国精产品一区一区三区有限公司杨| 亚洲熟妇av综合网五月| 欧美黑人一区二区三区| 色射视频| 山东熟女啪啪哦哦叫| 制服 丝袜 有码 无码 中文| 第四色在线视频| 无码人妻斩一区二区三区| 国产成熟女人性满足视频 | 国产精品白丝喷水在线观看| 日韩av无码国产精品| av无码制服丝袜国产日韩| 男插女视频网站| 一起草av| 国产乱码1卡二卡3卡四卡5| av色综合| 性欧美日本| 亚洲高清 一区二区三区| 国产黑色丝袜在线看片不卡顿| 强侵犯の奶水授乳羞羞漫虐| 亚洲精品成人久久| 五月丁香六月综合av| 亚洲熟女中文字幕男人总站| 精品五月天| www.欧美成人| 日本免费一区二区三区在线播放| 国产亚洲欧洲综合5388| 国产精品麻豆视频| 性猛交ⅹxxx富婆视频| 亚洲一区二区三区影院| 多毛小伙内射老太婆| 日本黄色一级视频| 久久久久久久久久影院| 韩国乱码片免费看| 亚洲日韩中文在线精品第一 | 四虎精品视频永久免费| 久久午夜福利无码1000合集| 成人免费乱码大片a毛片|