欧美极度丰满熟妇hd-欧美日本精品一区二区三区-一边摸一边抽搐一进一出口述-人人妻人人藻人人爽欧美一区

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： 亚洲av午夜精品无码专区| 亚洲熟妇无码一区二区三区导航| 亚洲综合精品伊人久久| 亚洲av永久无码精品国产精品| 欧洲多毛裸体xxxxx| 国产精品久久久久久久久久直播| 宝贝把腿张开我要添你下边动态图| 最新无码国产在线播放| 黄色a级国产免费大片| 国产极品美女高潮抽搐免费网站| 久久久久亚洲av无码专区喷水| 一本精品中文字幕在线| 天堂√在线中文官网在线| 大尺度无遮挡激烈床震网站| 日韩丝袜欧美人妻制服| 18禁又大又黄| 免费无码av片在线观看播放| 成 人 色综合 综合网站| 中文字幕在线无码一区二区三区| 国产色婷婷五月精品综合在线| 精品无码成人片一区二区| 无码高潮少妇毛多水多水免费| 欧洲精品免费一区二区三区| 色播亚洲视频在线观看| 小鲜肉自慰网站| 人妻aⅴ中文字幕| 久久精品国产精品亚洲蜜月| 狠狠色综合网站久久久久久久| 人妻无码一区二区三区免费| 亚无码乱人伦一区二区| 中文字幕+乱码+中文乱码www| 东京热人妻一区二区三区| 国产美女精品一区二区三区| 免费三级现频在线观看免费 | 久久久久亚洲av无码专区电影| 国产精品白丝av网站| 午夜视频在线在免费| 国产裸体舞一区二区三区| 在线精品国产一区二区三区| 国产亚洲精品福利在线无卡一| av激情亚洲男人的天堂国语|