亚洲成av人无码综合在线观看,在线观看av永久,亚洲精品色AV无码看,色爱无码AV综合区老司机非洲,麻豆国产96在线日韩麻豆,91丨九色丨首页在线播放,国产精品边做奶水狂喷无码,2021国内精品久久久久精免费,手机看片久久国产永久免费,91人妻日韩人妻无码专区精品

<fieldset id="6s0gq"></fieldset>
<blockquote id="6s0gq"><dfn id="6s0gq"></dfn></blockquote>
<fieldset id="6s0gq"></fieldset>
    <strike id="6s0gq"><input id="6s0gq"></input></strike>
    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

    亚洲精品动漫在线观看| 亚洲国产精品成人综合色| 色综合天天综合网国产成人网| 国产精品尤物铁牛tv| 国产午夜视频看看果冻| 无码国产精品一区二区免费模式| 少妇又爽又刺激视频| 欧美激情一区二区久久久| 亚洲中文字幕在线观看| 天堂av一区二区在线观看| 视频一区二区三区中文字幕狠狠| 亚洲AV永久无码一区| 国产SUV精品一区二区| 亚洲国产一区久久yourpan| 一本一道波多野结衣一区二区| 东京热亚洲色欲影院一区二区| 亚洲VA中文字幕无码一二三区| 制服丝袜一区二区三区在线| 国产精品中文字幕不卡| 一个人免费观看WWW在线视频| 亚洲色精品国产一区二区三区| 99热6这里只有精品| 成人三级一区二区成人| 国内精品久久久久影院优| 久久中文av| 欧美亚洲第一页| 日韩成人av一区二区| 久久久精品人妻一区二区三区| 超碰成人av免费观看| 国产三级高清在线观看.| 亚洲欧美日韩久久精品| 亚洲视频在线观看青草| 国产视频一区二区三区四区视频| 亚洲激情在线观看第三页| 日韩在线中文字幕一区| 亚洲精品无码不卡在线播放| 国产成人久久精品推最新| 日韩偷拍视频一区二区三区| 先锋影音人妻啪啪VA资源网站| 成午夜精品一区二区三区| 亚洲在线一区二区三区四区|