China's imports are greater than exports channel. Simple import and accompanying sub-project to introduce two sets of import and other channels. In recent years, several major ports in China's coastal areas (Dalian, Tianjin, Qinhuangdao, Lianyungang, etc.) in the new, expanded oil, coal, grain and other bulk import and export commodities automatic loading and unloading works, with the main equipment imported at the same time, imports are also large channel increasing. The main producing countries and regions as Japan, Russia and Western Europe. The main exports to Hong Kong and Macao outlet channel. Drain plating is plated directly affect the life of q235b channel, it is not allowed to defect, can not simply be covered with a layer of silver paint trouble. Such as leakage phenomenon plated individual and small size, but also inconvenient return plated, in consultation ASTM A780-80 approach adopted in the repair. In the face of particularly high silicon content galvanized steel, gray matte coating can not be completely avoided, but the current manufacturers in the country the choice of low-alloy high-strength structural steel is not much room for 12 # channel, both supply and demand should clear in advance. Coating students "white rust" is also frequently encountered phenomenon, if a large amount of the coating of the white rust on the 20th channel can be wiped off before the white rust zinc coating thickness measurement, as long as the zinc layer thickness is sufficient, for the use of no effect . Hefei channel | 12 # channel | Fair Commerce Bo (certified merchants) are provided by the Hefei exhibition Bo Trading Company. Hefei channel | 12 # channel | Fair Commerce Bo (certified merchants) Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) this year introduced a new upgrade, the above picture is for reference only, please You call Tel picture on this page or to obtain the latest information, contact: Mr. Huang.