熟妇啊轻点灬大ji巴太粗最新视频,在线观看国产片国产片在线观看,国产美女自拍一区

<nav id="2eeee"></nav>

<nav id="2eeee"></nav>

<tr id="2eeee"></tr>

<tr id="2eeee"></tr>

<nav id="2eeee"><sup id="2eeee"></sup></nav>

av免费资源在线观看,中文字幕一区二区三,亚洲欧美va天堂人熟伦,精品乱码一区二区,性感美女久久久,久久久女女女女999久久,深夜福利18,亚洲成人有码免费在线

<nav id="kkkkk"><sup id="kkkkk"></sup></nav>

<menu id="kkkkk"></menu>

<nav id="kkkkk"></nav>

<sup id="kkkkk"></sup>

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

News Up Next

Products

: Elliptical head

: Butterfly head

: Spherical head spin edge

: Flat Head

: Spherical head

: Bow bottom head

: Conical head

: Spherical cap shaped head

: Insulation panel

: Expansion Joints

: Jacket (cylinder) rotation side

: Manhole flange

Home Head Series Products News Parameter Company Profile Contact Us Company Culture

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

主站蜘蛛池模板：金坛市| 国产真人作爱免费视频道歉| 男女下面一进一出无遮挡| 激情亚洲一区二区三区| 梅河口市| 偷拍久久精品视频| 日韩AV导航| 一二三四观看视频社区在线| 精品熟女| 日韩AV导航| 精品自拍视频| 欧美性受xxxx狂喷水| 欧美va天堂va视频va在线| 色片网址| 亚洲乱码一区二区三区在线观看| 亚洲人成人伊人成综合网无码 | 荣成市| 亚洲精品久久久久中文字幕m男| 91资源在线| 日本一区二区不卡| 青娱乐极品视觉盛宴av| 手机看片日韩欧美| 宜黄县| 91人妻丰满熟妇Aⅴ无码| 一区二区AV| 色www88| 国产色诱视频在线观看| 3p视频在线观看免费| 手机看片日韩| 国产在线观看www污污污| 国产三级va| 色www88| 亚洲一区AV| 亚洲激情婷婷| 懂色av,蜜臀AV粉嫩av| 免费vA片| 插一插射一射视频| 熟女丝袜国产| www婷婷| 亚洲中文字幕精品久久久久久动漫| 熟女爱V|

<sup id="k0k0k"><code id="k0k0k"></code></sup>

<nav id="k0k0k"></nav>

<nav id="k0k0k"></nav>

<nav id="k0k0k"></nav>