Type B plug, plug head is flat on two legs. The circular ground plus one or another way, it is a Type A pin ground. Used primarily in North America and Japan (including Thailand) as well, there are still differences in the size of the pins between the United States and Japan, as well as Type A leg Ground of Type B is longer than the other two. Always stand so that when it is plugged in. Appliances are grounded. A status as ground before power is being supplied through the plug itself.
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