By 1817, there were 20 states in the Union, and it became apparent that adding one stripe for each new state would destroy the shape of the flag.
由1817年，有20个国家的联盟，很明显，增加一个条纹为每一个新的国家将破坏形状的国旗。
2
The main factors influencing metal transfer are the component of flux, the shape of wire section, the diameter of wire, the thickness of the steel stripe, and the welding parameters.