亚洲国产精品毛片av在线不卡_日韩激情毛片一区二区36页_黄色视频免费在线观看真人_精品一级电影毛片_亚洲欧美日韩国产图片视频_亚洲男人综合天堂_五十路六十路20人4时间_一级aⅴ毛片免费观看_国产日韩欧美中文字幕精品在线_日韩精品无码中文字幕一区二区

CN
Position: Home >> Application >> Sandblasting
The steel structure

2222-03bbe

The steel structure
To the steel structure, the speed of corrosion is mainly relate to the air relative humidity and the
composition and quantity of pollutant in the atmosphere.
In order to reduce metal corrosion and extend its service life, we must adopt the spreads brushes
and spray finishing methods after operate the surface treatment, to form the protective film in the
metal surface, and cause the metal and the corrosive medium isolates, thus prevents the metal the
corrosion.

 

點(diǎn)擊這里給我發(fā)消息