中文字幕在线亚洲精品,国产精品www夜色视频,国产精品av在线,久久久久夜夜夜精品国产,国产做爰又粗又大又爽动漫,欧美人妻aⅴ中文字幕,亚洲av无码国产综合专区,国产又色又爽又黄的,亚洲熟妇自偷自拍另欧美,狠狠精品久久久无码中文字幕

Service Hotline
086-577-86923687
Current Location:Home - News - Industry News
Head types and production methods
Release Time:2011-11-23  Views :
Category Head
 
Head Material can be divided into: plastic, stainless steel seal top, head products are mostly male, cone shell, adjustable sections, flat lid and tightening the mouth. Wherein the convex head (sometimes referred to by the shape classification) comprising: a hemispherical head, oval head, dished head and a spherical cap-shaped head.
Head of manufacturing methods
a) Small head: the overall shape;
b) large and medium-sized head: first splicing molding - the most widely used, mainly for the requirements of the standard in terms of it;
c) large head: because of factors such as transport and open file request to split forming, after welding together.
Key Words : 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

人妻少妇偷人精品一区二区三区| 国产精品 视频一区 二区三区| 中文字幕在线观看国产双飞高清 | 国产女高清在线看免费观看 | 首页动漫亚洲欧美日韩| 精品的一区二区三区| 久久免费精品日本久久中文字幕| 日本丰满少妇裸体自慰| 国产精品美女久久久久| 中文不卡视频| 少妇太爽高潮在线播放| 国产精品永久久久久久久久久| 无码任你躁久久久久久| 国产乱人视频在线观看播放器| 极品少妇高潮在线观看| 中文字幕人妻无码视频| 欧美老妇与禽交| 自拍视频国产在线观看| 国产一区二区三区亚洲avv| 特级a欧美做爰片第一次| 亚洲AV一二三四区四色婷婷| 国产一区二区三区特黄| 中文字幕 亚洲精品 第1页| 国产午夜精品久久久久免费视| 91精品91久久久久久| av影片手机在线观看免费网址| 夫妇交换性三中文字幕| 日韩精品大片在线观看| 亚洲精品二区三区在线观看| 真实夫妻露脸爱视频九色网| 在线人成免费视频69国产| av无码天堂一区二区三区| 美国黄色av一区二区| 欧美变态另类刺激| 国产欧美精品在线一区二区三区| 国产精品成人久久a级片| 一边摸一边抽搐一进一出视频| 色狠狠一区二区三区香蕉| 久久精品国产热| av男人天堂网在线观看| 初尝人妻少妇中文字幕|