涩老板在线免费视频_午夜成人精品_神马理论午夜,,_亚洲有薄码区久久欧美精品一区_97人人色_神马在线精品_成人熟女一区二区_亚洲二区三区四区_人妻午夜免费_大鸡巴猛男爆操骚逼国产一区二区_丁香婷婷久久一区二区三区_岛国内射美女_亚洲一级电影,亚洲欧美日韩国产最新版,亚洲五月综合缴情综合久久本,少妇色情喷水又紧又爽小说,巜上司的少妇的滋味,国产精品三级女人国产香蕉,亚洲最好的免费电影,欧美亚洲国产成人精品,国产永久一区二区三区,亚洲综合一区无码精品,歳の熟女セックス,内射带小孩熟妇,果冻传媒在线看免费视频观看,成人欧美一区二区三区片,亚洲 片内射欧美美妇,一本无码人妻在中文字幕免费,亚洲无毛视频,中文字幕丰满孑伦无码专区,亚洲爆乳无码专区色戒纶理,肉乳床欢无码片动漫软件,欧美日韩一区二区另类,久热只有精品在线直播,精品亚洲一区二区在线播放,精品国产乱码久久久久久影片,国产一级高清在线观看,国产精品福利在线一区,成人动漫下载,乱伦性爱视频,xo无码AV毛,国产黄A片免费网站免费,日韩欧美一级特黄特色大片

人們跟著日子水平的前進，通風設備變成了修建、企業等各個領域不可短少的一部分，也是社會的新向標。通風設備的配件之一風管；風管風角鐵法蘭風管、共板法蘭風管，他們依據質料又分為好多種，一般常用的便是鍍鋅白鐵皮風管，不銹鋼風管；中不銹鋼風管在運用進程中不免有保養不妥的時分；所以會長一些銹：

As people keep pace with the progress of the times, ventilation equipment has become an indispensable part of various fields such as construction and enterprises, and it is also a new direction of society. One of the accessories of ventilation equipment is the air duct; Air duct angle iron flange air duct and common plate flange air duct are divided into several types based on the material. The commonly used ones are galvanized white iron sheet air duct and stainless steel air duct; During the use of medium stainless steel air ducts, there may be times of improper maintenance; So there will be some rust:

1、首要除掉外表各種可見污物，然后用溶劑或清洗劑除油。

1. Firstly, remove all visible dirt on the surface, and then use solvents or cleaning agents to remove oil.

2、用鎢鋼鏟刀鏟去大面積銹蝕。

2. Use a tungsten steel shovel to remove large areas of rust.

3、用刮刀和鋼絲刷除掉邊角部位銹蝕。

3. Use a scraper and wire brush to remove rust from the edges and corners.

4、用銼除掉焊渣等杰出物和各種毛刺。

4. Use a file to remove outstanding objects such as welding slag and various burrs.

5、用砂布和鋼絲刷進行收拾。

5. Clean up with sandcloth and wire brush.

6、用潔凈抹布，也可用抹布沾取溶劑進行清潔并及時涂裝底漆。

6. Use a clean cloth, or use a cloth dipped in solvent to clean and apply primer in a timely manner.

7、留神關于沒有失效的耐性涂膜，可予以保存，并用砂布打毛舊漆外表，將涂膜殘缺處打磨成斧型，清潔后直接涂漆。

7. Pay attention to the durable coating that has not failed. It can be preserved and the old paint surface can be roughened with sandcloth. The damaged parts of the coating should be polished into an axe shape, and then painted directly after cleaning.

還有一種簡略的辦法便是將法蘭浸入鹽酸中，原理是把銹還原成鐵了，但此法有危險性，鹽酸是腐蝕性物質，對人體有害，操作時要留神不要沾到人體上，還有弄好的法蘭再用堿中和一下，不要直接沾手。

Another simple method is to immerse the flange in hydrochloric acid. The principle is to reduce rust to iron, but this method is dangerous. Hydrochloric acid is a corrosive substance that is harmful to the human body. When operating, be careful not to touch the human body. Also, neutralize the finished flange with alkali and do not touch it directly.