狠噜噜狠狠干,奇米777在线观看视频,少妇伦子伦精品无码视频,av天堂综合

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

亚洲精品国产一区二区精华液| 老色69久久九九精品 | 久久精品国产免费播蜜桃| 91丨九色丨人妻3p| 亚洲人在线看| 国产精品无吗在线观看| 成人有色视频免费观看网址| 13一14毛片免费看| AV社区男人天堂| 国精无码欧精品亚洲一区| 不卡AV一区二区| 欧美在线人视频在线观看| 毛片在线免费播放| 亚洲熟女综合一区二区三区 | www.亚洲无码| 阿v视频在线观看免费视频| 亚洲一区 熟妇| 在线观看视频免费18| 啊啊啊啊啊日本色婷婷| 国产AV无码区亚洲AV| 精品成人免费看| 国产丨熟女丨| 亚洲精品9久久久久久中文字幕| 蜜AⅤ无码精品一区二区三区| 国产69精品久久99不卡无限看下载 | 成人av区一区二区| www.99pao| 亚洲国产精品性Jk| 男女啪啪啪啪免费看| chinese爽东北女人| 国产人成在线观看| 免费高清在线一区二区| 精品人妻人人操| 久久AV影视| 99国产超薄丝袜足j在线播放| 日韩精品一区二区三区四区五区| 无码人妻久久一区二区三区app| 超碰资源人妻字幕| 男男车车的车车网站w98免费| 精品黑人一区二区三区久久| 一区二区三区影院|