The United States of America, Myanmar, and Liberia.
However, in Myanmar and Liberia, the metric system has been used parallel with imperial, and both countries are on their way to completely switch on using only one, which would be the metric system.
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几百瓦的头啊:
The United States of America, Myanmar, and Liberia.
However, in Myanmar and Liberia, the metric system has been used parallel with imperial, and both countries are on their way to completely switch on using only one, which would be the metric system.