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

少妇性l交大片| 91九色播放在线观看| 欧美熟妇另类久久久久久多毛 | av资源在线播放网站| 亚洲欧美v国产蜜芽tv| 国产内射一级一片内射高清视频1| 无码无套少妇毛多18p| 人妻久久久一区二区三区| AV有码在线免费看| 精品女同一区二区三区不卡 | 久久久国产精品123| 亚洲国色天香卡2卡3卡4| 人妻在线中文字幕| 色二av手机版在线| av天堂亚洲另类色图在线播放| 久人人爽人人爽人人片av| 国产色诱视频在线观看| 精品国产品香蕉在线| 洲色熟女图激情另类图区| 一本一道av中文字幕无码| 99热成人精品国产免国语的| 开心五月激动心情五月| 国产午夜福利片在线观看| 国产精品人妻一区夜夜爱| 亚洲熟妇网| 精品色老头老太国产精品| 亚洲小说区图片区色综合网| 国产成人亚洲日韩欧美| 国产成人亚洲综合无码精品| 亚洲国产av精品一区二| 婷婷色综合视频在线观看| 国产乱人伦精品一区二区| 色二av手机版在线| 一区二区三区国产黄色| 成人午夜福利视频镇东影视| 午夜亚洲国产理论片亚洲2020| 国内揄拍国内精品久久| 女人被男人爽到呻吟的视频| 国产做无码视频在线观看浪潮| 一区二区三区四区四色av| 草草影院发布页|