国产免费久久精品国产传媒,张栢芝被柔到高潮下不了床,国产午夜精品一区二区三区,亚洲av无码一区二区三区观看

Welcome to the official website of Suzhou Sutong special cold drawn steel Co., Ltd!
Ch En
Your location: Home > Information Dynamics > Industry trends

How to install the door shaft

Source:m.laowuboy.com      Release date: 2025年03月17日
Information summary:The installation steps for the door shaft are as follows: 1. Preparation work Confirm the size of the door and door frame, select the appropriate door pivot, and usually match the length and load-bearing capacity of the door pivot with the size and weight of the door.
The installation steps for the door shaft are as follows:
1. Preparation work
      Confirm the size of the door and door frame, select the appropriate door pivot, and usually match the length and load-bearing capacity of the door pivot with the size and weight of the door.
      Prepare installation tools such as drills, screwdrivers, wrenches, level gauges, plumb lines, etc.
2. Installation steps
(1) Determine the position of the door shaft: Mark the installation position of the door shaft at the corresponding position between the door frame and the door. Generally speaking, the door shaft should be installed at the edge of the door, and the upper and lower door shafts should be on a vertical line. You can use a plumb line and a level to ensure the correct position.
(2) Install the upper door shaft: Fix the fixing seat of the upper door shaft to the top of the door frame with screws or bolts. Ensure that the fixed seat is securely installed and the screws are tightened to prevent loosening. Some door hinges may require drilling holes on the door frame first, and then installing the fixing seat.
(3) Install the lower door shaft: At the installation position of the lower door shaft, first dig a suitable groove on the ground to place the base of the lower door shaft. Place the lower door shaft base into the groove, adjust its levelness with a spirit level, and then fix the base to the ground with concrete or other fixing materials. Be sure to leave enough space for the shaft of the door shaft to rotate freely.
(4) Install door shaft sleeve: Install the door shaft sleeve at the position corresponding to the door shaft at the edge of the door. The door shaft sleeve is usually fixed to the door with screws. It is necessary to ensure that the hole of the door shaft sleeve is aligned with the position of the upper and lower door shaft shafts, so that the door can be installed and rotated smoothly.
(5) Install the door: Lift the door up to align the door shaft sleeve with the shaft of the door shaft, then slowly lower the door and insert the door shaft sleeve into the door shaft sleeve. Check if the installation of the door is vertical and flat. If there is any deviation, it can be corrected by adjusting the position of the door shaft or shims.
(6) Adjustment and testing: After installation, conduct a door opening and closing test to check whether the door rotates smoothly and whether there is any jamming or friction. If there is a problem, it is necessary to adjust the position of the door shaft in a timely manner or check whether the door shaft sleeve is installed correctly. At the same time, check the fit between the closed door and the door frame. If there are any large gaps or other issues, corresponding adjustments need to be made.
3. Precautions
      During the installation process, it is necessary to strictly follow the installation instructions of the door shaft. Different types of door shafts may have different installation details.
      Ensure that the installation position of the door shaft is correct, otherwise it will affect the normal use and service life of the door.
      During the installation process, attention should be paid to safety to avoid personal injury caused by improper use of tools or accidental dropping of doors.
女厕厕露p撒尿八个少妇| 梦精爱2| 55岁大妈玩csgo| 做爰高潮全过程免费的小黄文 | 丰满少妇三级全黄| 人妻激情偷乱视频一区二区三区| 浮力影院50826| 国产探花在线精品一区二区| 无人在线观看免费高清视频| 双xing挨cao日常美人多汁| 性xxxx视频播放免费| 99久久国产露脸国语对白| 美妙人妻系列100部| 宝宝腿再趴开一点就不疼了| 天堂在线观看www| 羞羞答答麻豆国产免费观看 | 99热这里只有精品| 玩弄丰满熟妇xxxxx性| 日本少妇高潮喷水xxxxxxx| 国产粉嫩高中无套进入| 熟妇的奶头又大又粗| 久久久精品456亚洲影院| 无码熟妇人妻AV在线影片免费| 黑帮大佬和我的365天| 欧美性受xxxx黑人xyx性爽| 精品香蕉一区二区三区| 日韩精品久久久肉伦网站| 被夫の上司持久侵犯耻辱| 天干夜天干天天天爽视频| 久久精品人人做人人爽电影蜜桃| 浪荡艳妇爆乳jufd汗だく肉感| 秋霞午女人弄到高潮a片| 2012手机免费观看版国语| 婷婷亚洲五月色综合久久| 舌头伸进去添的我好爽高潮电影 | 国产精品亚洲一区二区久久| 最近免费观看在线中文2019 | 国产真实露脸乱子伦| 国产情侣一区二区三区| 熟妇人妻中文字幕无码老熟妇| 久久久久久亚洲精品不卡|