久久99精品久久久影院老司机-午夜爱爱爱爱爽爽爽网站-无码a∨高潮抽搐流白浆-久久久亚洲欧洲日产国产成人无码-精品久久久久久

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: 色欲综合久久中文字幕网| 免费的美女色视频网站| 国产精品视频网国产| 无码人妻丰满熟妇啪啪欧美| 国内精品自在自线| 国内精品久久久久久久久齐齐| 99无码| 国产成人综合精品无码| 大肉大捧一进一出好爽视频动漫| 五月天激情电影| 亚洲国产精品久久久久久无码| 少妇被粗大的猛进69视频| 国产精品另类激情久久久免费 | 老熟女视频| 欧美日韩亚洲一区二区三区一| 国产精品538一区二区在线| 潮喷无码正在播放| 国产成人精品怡红院在线观看| 99这里只有精品| 久久无码av中文出轨人妻| 欧美另类精品xxxx人妖| 亚洲欧洲无码专区av| 少妇愉情理伦片丰满丰满| 看黄a大片爽爽影院免费无码| 特级婬片国产高清视频| 毛片一区二区三区无码蜜臀| 3atv精品不卡视频| www一区二区乱码www| 国产亚洲日韩a欧美在线人成| 无码中文字幕乱码三区日本视频 | 国产一区二区无码蜜芽精品| 中文在线а√在线天堂中文| 亚洲成在人线在线播放无码vr| 久久永久免费人妻精品下载| 色偷偷av一区二区三区| 狠狠88综合久久久久综合网| 大桥未久亚洲无av码在线| 久久久无码精品亚洲日韩蜜桃| 无码国内精品久久人妻| 国产亚洲精品久久久美女| 无码精品人妻一区二区三区人妻斩|