The principle is to have a bit extra to add to the information that you want to send it to detect the error
instead of the original, which is 2 times, and then send the information to the information received by the two to compare them. bits per bit, is the time to add
may be added as a group or groups attached to a short bit at the end of the information
When the public sector is, and then to check for error
if there is no mistake, it will be a bit short, the group has added the information, and then get it, but really
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