夜色撩人在线观看,欧美人禽杂交狂配,日本肉体xxxx裸体137大胆,亚洲一区av在线观看,性做久久久久久免费观看,国产精品久久久久久人妻无,人妻天天爽夜夜爽一区二区,99久久精品费精品国产

Chinese

ENGLISH

Xing Sheng

Contact Us

河北興盛塑料管業(yè)有限公司

Website     :www.nouqu.cn

Contact     :Manager Zhang

Phone       :13933323655

Mail          :hbxsslgy@163.com

Buy online:https://shop377465757.taobao.com/

Common problem Common-problem
New technology combining PVC pipe and copper pipe

When it comes to PVC pipe, we will be very familiar with it, but when it comes to the technology of combining PVC pipe with copper pipe, we may be very unfamiliar with it. In the current market, the joint of PVC pipe with copper pipe is also a big problem. In Japan, a piece of jiushui chemical company is studying the PVC pipe and copper pipe joint.
 
(1) In advance in the copper tube one end of the inner wall coated with a curable special adhesive, and then stretch PVC pipe into the copper tube, and then tilt and roll along the pipe axis, so that the remaining adhesive removed, finally make the liquid binder solidified.
 
(2) It is primarily to connect the medium diameter PVC pipe and steel pipe with the flange:
 
1, PVC pipe and steel pipe, cast iron pipe joint, usually choose flange joint: medium diameter and above the standard. Small diameter valve joint can be selected: socket joint and external thread joint, tooth end and metal pipe joint of the same diameter. Another method is to select the socket joint and the internal thread adapter: the connector end is the female screw.
 
2, PVC pipe and metal pipe joint, medium - large diameter pipe selection bevel ring, that is, PVC pipe cooperation on PVC bevel ring made of flat mouth, cooperation with metal flange. Can be connected with the metal pipe flange with screws, and PVC pipe end, can choose the metal pipe flange. Same can use looped joint, outside diameter requirement common.
 
This technology is difficult, but if it is used on a large scale, it will also bring new opportunities for PVC pipes and the construction industry.
 

  • Official Website

  • Taobao Shop

  • Wechat Account
主站蜘蛛池模板: 日韩亚洲精品国产第二页| 酷客免费影院| gogogo高清在线观看中国| 午夜精品久久久久久久| 国产精品无码久久综合网| 美女黄频视频大全免费的国内 | 性中国妓女毛茸茸视频| 久久黄色网站| 国产av无码国产av毛片| 精品国产一区二区三区久久狼| 精品久久久久久亚洲中文字幕| 成人国产一区二区精品| 日本xxwwwxxxx18| 18一20亚洲gay无套| 久久天堂av综合合色| a级毛片无码免费真人| 婷婷四虎东京热无码群交双飞视频| 精品国产av无码一区二区三区| 九九99亚洲精品久久久久| 亚洲国产精品18久久久久久| 丰满人妻翻云覆雨呻吟视频| 精品一区二区三区在线观看视频| 在线观看美女网站大全免费| 先锋五月婷婷丁香草草| 我把护士日出水了视频90分钟| 久久亚洲人成网站| 亚洲国产理论片在线播放| 老熟妇毛茸茸bbw| 狠狠色噜噜狠狠亚洲av| 欧美videosdesexo| 丰满少妇被粗大猛烈进人高清| 色噜噜狠狠综曰曰曰| 好男人视频在线观看免费完整版| 18禁勿入午夜网站入口| 亚洲av无码乱码麻豆精品国产| 4hu四虎永久在线观看| 亚洲av日韩精品久久久久| 亚洲色在线无码国产精品不卡| 人人妻人人澡人人爽精品欧美 | 欧美一级一区二区三区| 国产午睡沙发系列大全|