Who knows where the adapter in America can be used?

American standard sockets can be used in China, but only two plugs can be inserted. The plug can be inserted into a multifunctional socket. The ground wire of the American plug is round, and that of our country is flat. The fire line and the zero line in the United States are flat, and ours is flat splayed. Look at your laptop plug. American standard socket refers to a socket that is different from three kinds of plugs commonly used in China. American standard socket is a socket with leakage protection and overload protection, which is a very high-end product, completely different from ordinary sockets used in China.