Steel structure (steel construction) is a kind of structure composed of steel materials, and it is one of the most popular building structures at present.
The unexpected COVID19 has caused a shortage of face masks. In order to alleviate the global face mask shortage amid the coronavirus pandemic, factories have been scrambling to make more surgical masks and KN95/N95 masks since February.
Both mechanical properties and technological properties of metals are important in metal fabrication.
The most popular welding processes used in metal fabrication include: gas metal arc welding(GMAW) , flux cored arc welding (FCAW), shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), oxyacetylene welding (OAW), and torch or oxyfuel brazing (TB).
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