亚洲最黄视频-亚洲最大在线-亚洲最大网址-亚洲最大色网-亚洲最大色视频-亚洲最大情网站在线观看

Greenhouse tube

Greenhouse tube

DESCRIPTION

Greenhouse building structure with tube 1, hot-dip galvanized steel pipe structure: hot dip galvanized pipe is the molten metal and the reaction of the iron matrix alloy layer, so that both the substr


DETAILS

Greenhouse building structure with tube
1, hot-dip galvanized steel pipe structure: hot dip galvanized pipe is the molten metal and the reaction of the iron matrix alloy layer, so that both the substrate and coating combination. Hot galvanized pipe is the first pickling pipe, in order to remove the iron oxide on the surface of the steel pipe, after pickling, ammonium chloride or zinc chloride solution or aqueous solution of ammonium chloride and zinc chloride tank cleaning, and then sent Into hot dipping tank. Hot dip galvanized coating with uniform, strong adhesion, long life and other advantages. Hot galvanized steel substrate and the molten bath complex physical and chemical reactions, the formation of corrosion-resistant zinc-iron alloy layer closely. Alloy layer and pure zinc layer, steel substrate integration. Therefore, its strong corrosion resistance.
2, galvanized pipe structure: galvanized pipe to produce the production of hot-dip galvanized pipe made adjustments. In order to remove the iron oxide on the surface of the steel strip, the steel strip is first pickled, cleaned with an aqueous solution of ammonium chloride or zinc chloride or a mixed solution of ammonium chloride and zinc chloride, and then cleaned Into hot dipping tank. Then air-dried, and then made of pipe. With a coating uniform, bright, very little galvanized, than the cost of producing hot-dip galvanized pipe. Its corrosion resistance slightly worse than the hot-dip galvanized pipe!
3, hot-dip galvanized steel pipe and galvanized pipe difference: hot-dip galvanized pipe:
1) color hot galvanized pipe a little whitish, weight: 6.5 kilograms long 6 meters (corrosion resistance, long life, the price is slightly higher);
2) Galvanized pipe snow white, but not shiny, non-reflective, many snowflake-like surface, two ports of zinc tumor (condensed zinc)
Galvanized pipe:
1) Color Galvanized pipe is a little blue, 2) Weight: 5.5 kg in 6 meters long (corrosion resistance is slightly worse than the service life of hot-dip galvanized steel pipe short life, low price economy).
2) Galvanized tube White too bright and reflective, very few snow-like, two-port clean zinc-free tumor.

RELATED PRODUCTS

亚洲男人的天堂无码 | 少妇极品熟妇人妻网站 | 18 爽 精品 国产站长 | 一区二区在线视频 | 天天干天天日天天干天天日天天干天天 | 国产精品久久久久久亚洲色欲 | 国产精久久 老狼网站漫画 | 天天臊日日臊AAAAXXXX | 性猛交XXXX乱大交孕妇2 | 成人黄色免费网址 | 麻豆精品秘 国产 | 又大又长又粗又黄 | 91e热在线视频精品 国产精品视频一区福利 | 成人污视频在线观看 | 精品人妻一区二区三区蜜桃 | 又粗又猛又黄的视频观看免费 | 一级a一级a爰片免费免会永久 | 久久婷婷综合五月丁香亚洲绯色 | 熟女人妻在线观看 | 精品人伦一区二区三区蜜桃网站 | 精品国产乱码久久久 | 丰满欧美熟妇免费视频 | 91成人 在线观看喷潮蘑菇 | 波多野结衣一级片哪里看 | 欧美日韩国产在线一区 | 男女无遮挡动图120秒免费在线观看 | 91精品国产成人www | 午夜福利伦伦A片免费视频新闻 | 亚洲一区二区三区视频观看 | 精品国产AV一区 | 97人妻人人澡人人添人人爽 | 国产美女一区二区三区 | 岳妇伦丰满69ⅩXXX毛片 | 一级婬片A片试看50分钟 | 大家都在搜老司机AV | 日韩少妇一区二区 | 黑人玩弄人妻一区二区三区影院 | 国产麻豆精品原创无码 | 国产精品海角社区视频 | 亚洲区日韩少妇AV高清无码 | 国产18禁男女无遮挡白浆网站 |